Who are mollusks. Type and classes of mollusks. The overall characteristic of mollusks. What is salivary iron from mollusks? On the methods of hunting snails

Mollusks - Bilateered symmetric soft animals (in the buchetic body asymmetric), having a sink, a mantle, mantle cavity, unlocked blood system).

The secondary cavity of the body (whole) is well expressed only in the germinal state, and in adult animals is preserved in the form of a shallower bag and cavity. Intervals between the organs are filled connective tissue. Such a body cavity is called mixed or mixture.

The type of mollusks combines classes: Bryukhonogi, bivalve, cephalopod.

External structure

The body of mollusks non-gential And consists of out heads (it is not bivalve), inca torso.

Head is available almost in all clams, except for bivalves. It is located the oral hole, tentacles and eyes.

Leg - Muscular unpaired body increase, which serves to crawl.

Most clams have a sink.

The torso of mollusks is covered with a skin fold - mantia (the substance from which the sink is built is highlighted by cages of the mantle). The space between the walls of the body and the mantle is called mantle cavity. It has respiration organs. Anal, sex and excretory holes are opened in the mantle cavity.

Mantle mantle - This is a skin fold between body and sink.

Mantle cavity - This is the space between the walls of the body and mantle.

Mollusk organs are combined into systems: digestiverespiratory, blood, nervous, excretory, sex.

Digestive system

The digestive system depends on the type of power of mollusks.

The mouth cavity goes into the throat, and then in the esophagus, which leads to the stomach and intestines. Doubles fall into it digestive gland anal hole.

The breath in the mollusks living in water is carried out by the gills, and the ground-based - with the help of a lung. Some aqueous mollusks (for example, pondoviki), also breathe light, periodically climbing to the surface of the water to breathe atmospheric air.

Blood Satema

The bloodstream includes a heart (an organ that provides blood flow through vessels and body cavities) and vessels. The heart usually consists of three cameras: one ventricle and two atrialities (in buchelogih - two chambers - atrial and stomach).

Mollusks have an impaired circulatory system (except for chasing). This means that blood flows not only on the blood vessels, but also by special cavities between the organs, and then the blood is once again assembled into the vessels and enters the gills or lungs for enrichment with oxygen.

Nervous system and senses

The nervous system varies according to the degree of complexity and the most developed in chalp clams.

It consists of several pairs of well-developed nerve nodes located in different parts of the body, and departing nerves from them. Such a nervous system is called scattered.

Selective system

The separation of mollusks is one or two kidneys, the excretory holes of which are opened in the mantle cavity.

Reproduction

Mollusks multiply only sexual way. Most of them separately, but there are also hermaphrodites. Mollusks multiply, laying fertilized eggs. Fertilization in mollusks is external (for example, oyster and toothless) and internal (in a grape snail).
From the fertilized egg, it is developing or a larva, a leading plankton lifestyle (sailboat), or a small mollusk formed.

Origin

Apparently, the mollusks occurred from the ancestors common with the ricycled worms, who had a weakly developed secondary body cavity, there were cervous covers and there was no dismemberment of the body to segments.

In the embryonic (germs), the development of mollusks can be observed a lot of common with the development of nullifying ring worms. This indicates ancient historical (evolutionary) links between them.

A typical larva of marine mollusks (sailboat) is very similar to the larch of ringed worms, carrying large blades seated with cilia.

The larva leads a plankton lifestyle, then settles on the bottom and takes the appearance of a typical burglar mollusk.

Class of the Poultryogy - the most diverse and common group of mollusks.

Buchetic about 90 thousand modern species living in the seas (rapana, cones, murkes), fresh reservoirs (pondoviki, coils, logs), as well as on land (slugs, grape snails).

External structure

Most bucculent clams have a spiral swirling sink. Some sink is underdeveloped or completely absent (for example, naked slugs).

The body consists of three departments: headstorso and legs.

On the head there are one or two pairs of long soft sucks and a pair of eyes.

In the torso - internal organs.

The leg of the buncrounds is adapted to crawl and is a muscular grown of the abdominal part of the body (hence the name of the class).

Prudovik ordinary - dwells in fresh reservoirs and shallow water of rivers throughout Russia. It feeds on vegetable food, scraping the grain soft tissue of plants.

Digestive system

In the oral cavity of the bucculent clams, there is a muscular tongue with chitinium teeth forming the "grater" (or randul). Hermitic mollusks Tyrka (Radules) serves to scrape vegetation food, predatory - helps to hold prey.

The oral cavity usually opens salivary glands.

The mouth cavity goes into the throat, and then in the esophagus, which leads to the stomach and intestines. Doubles fall into it digestive gland. Imaginary food residues are thrown through anal hole.

Nervous system

Nervous system ( figure shows the yellow color) consists of several pairs of well-developed nerve nodes located in different parts of the body, and departing nerves from them.

The bucculent mollusks are developed by the senses, they are located mainly on the head: Eyes, tentacles - Touch Authorities, Equilibrium Bodies. The buchetic devices are well developed sense of smell - they can recognize odors.

Blood Satema

Labor clamps have an impaired circulatory system consisting of heart and vessels. The heart consists of two cameras: ventricle and atrium.

The breath in the mollusks living in water is carried out by the gills, and the ground-based - with the help of a lung.

In the mantle cavity in most water buchelih mollusks, there are one or less often, two gills.

Prudovikov, coils, grape snails, the mantle cavity acts as a lung. Oxygen from atmospheric air filling the "lung" penetrates through the wall of the mantle in the blood vessels branched in it, and carbon dioxide gas from the blood vessels enters the cavity of the "lung" and comes out.

Selective system

The separation of mollusks is one or two kidneys.

Unnecessary for the body of the metabolic products comes from the blood to the kidney, the dumped of which opens into the mantle cavity.

The liberation of blood from carbon dioxide and oxygen enrichment occurs in the respiratory organs (gills or in an easy).

Reproduction

Mollusks multiply only sexual way.

Prudoviki, coils, slugs - hermaphrodites.

Fertilized eggs they usually lay on the leaves of plants and various water items or between the soil lumps. Little snails come out of eggs.

Many sea buchelients are separate animals, they develop with lichwater Stage - Sailboat.

Value

Many mollusks serve feed for fish and birds. Ground bunthogs eat amphibians, moles, hedgehogs. Some types of bunthogs eat in food and man.

Among the brickelogs there are pests of gardens and gardens - slugs, grape snail, etc.

Bivalve mollusksexceptionally aquatic animals, they mainly lead a sedentary lifestyle. Most of them live in the seas (mussels, oysters, sea scallops), and only a small part inhabites in fresh reservoirs (toothless, peklock, River Draisen).

Characteristic feature of bivalves - No head.

The shell of bivalve mollusks consists of two sash (hence the name of the class).

Representative - uzabka ordinary. Its body consists of a torso and legs covered with mantle. It hangs from the sides in the form of two folds. The cavity between the folds and the body is the leg and gill plates. Heads at toothless, like all bivalve, no.

At the rear end of the body, both folds of the mantle are pressed to each other, forming two siphons: lower (introductory) and upper (output). Through the lower siphon, water enters the mantle cavity and wash the gills than breathing.

Digestive system

For bivalve mollusks, a filtration method of nutrition is characteristic. They have an introductory siphon, on it, water with food particles weighted in it (the simplest, single-celled algae, remnants of dead plants) enters the mantle cavity, where this suspension is filtered. Filtered food particles with ciliates are sent to retooth holeand a sip; Then enroll B. esophagus, stomach, intestines and through anal hole Enters the outlet siphon.
Uzablka is well developed digestive gland, whose ducts fall into the stomach.

Blowless mollusks breathing with gills.

Circulatory system

The circulatory system is unlocked. It includes the heart and vessels.

Reproduction

Toothless - separate animal. Fertilization occurs in the mantle cavitythe females, where through the bottom siphon, spermatozoa fall along with water. From fertilized eggs in the gills of mollusk develop larvae.

Value

Bivalve mollusks are water filtrators, animal feed, are used in food by man (oysters, scallops, mussels), producers of pearl and natural pearls.

The shell of bivalve mollusks consists of three layers:

fine outdoor horn (Organic);
the thick of medium - porcelain (lime);
internal - pearl.

The best varieties of pearls allocate thick-walled marine pearl sinks living in warm seas. In case of irritation of individual sections of the mantle, with sands or other objects on the surface of the pearl layer, pearls are formed.

Shells and pearls are used to produce jewelry, buttons and other products.

Some clams, such as a ship worker, called the body shape, harm wooden buildings in the water.

Changogo mollusks - a few group of high-organized animals, characterized by the most perfect comprehensive structure and complex behavior.

Their name is "cephalov" - it is explained by the fact that the leg of these clams turned into a tentacle (usually 8-10), located on the head around the oral hole.

Lopathoogiye, or Lordogy (ScaPhopoda). The name of the class comes from Greek. Skaphe - Boat, and Pouus - Leg. These are bottom marine animals, found from the shallow cattle to a depth of 5 km. Approximately 200 modern species and 350 extinct. There are found in all seas, except for the amateur. The body is bilateral-symmetric, elongated, covered slightly curved tubular sink. The head is reduced to a trunk with the mouth of the hole, the heart is also rudimentary - without atria. Animals separatogo. This class applies to the so-called. Sea tooth (Dentalium).
Bivaluble, or plastipoda-breaker (pelecipoda). The name of the class comes from Greek. Pelekys - Ax, and Pous - Leg. These are symmetrical water, mostly sea, mollusks with a double sink, but without a head. Oysters, pearls, mussels, scallops are all bivalves. The class has ok. 10,000 modern species, of which approximately 80% live in salted waters. They are found mainly at small depths. Some, such as oysters, lead a sedentary lifestyle, attaching to solid surfaces with bissing threads or cement, others can slowly crawl along the bottom and even swim (scallops). Many bivalves are capable of glowing into the ground, and a small number of species can drill a tree and even a stone. Representatives of this class are powered mainly by microscopic plankton and daddyite particles, partable from the surrounding water. Many bivalves have a large commercial value. Large income brings mining oysters. Among many others edible species The most popular is the tough shell (Venus Mercenaria) and the sandy sewer (MYA ARENARIA). Mussels and scallops are also used. Most of the species of this class of separate partners, but rather common in it and hermaphroditism. Sperm and eggs are usually released into water, where fertilization occurs, but sometimes, for example, freshwater toothless and perfoching, it is performed on the maternal gills, and the larvae is beginning there.
CHONEGOGE (CEPHALOPODA). The name of the class comes from Greek. Kephale - Head, and Pouus - Leg. These are highly organized marine mollusks, sometimes very large sizes, with a large head, well-developed eyes and the crown of long felts, or hands. The structure of the structure is the same as other mollusks, but the form and lifestyle are completely different. This class includes squid, cuttlefish, octopus and nautilus (ships). Changated - predators feed on spinal, molluscs and crustaceans. Many species are able to quickly swim, pushing water from the mantle cavity through a tubular siphon, and sometimes with the help of fins. Octopuses are usually crawling along the bottom, using their long tentacles for this. The cephalopion includes the largest modern invertebrate - the giant squid Architeuthis Princeps, the length of which reaches 15 m. In many countries, representatives of this class are used in food, and small squids often serve fishermen in bait. From the shells of some species, such as nautilos, make decorations. There are approximately 400 modern species and approximately 400 modern species. 5000 fossils.

The encyclopedia of the colley. - Open Society. 2000 .

Watch what is "mollusks" in other dictionaries:

Mollusks, representatives of more than 80,000 species of invertebrate animals like Mollusca. These include well-known snails, bivalve mollusks and squids, as well as many less famous species. Initially inhabitants of the sea, mollusks now ... ... Scientific and Technical Encyclopedic Dictionary

Mollusca, type of invertebrate animals. Arose presumably in the Precambrian; From the Lower Cambria already known to several. M. classes occurred, probably from the unservative worve-bond ancestors (Anneld) or directly from the flat ... ... Biological Encyclopedic Dictionary

Mollusks - Mollusks, or soft (Mollusca), well-closed type of invertebrate animals. The body is soft, abused, typically carries the sink. Skin surfaces form a robe, covering the body or growing along the edges with its surface. ... ... Big medical encyclopedia

- (Novo Lat. Mollusca, from lat. Mollis is soft). Soft animals, slugs. A dictionary of foreign words included in the Russian language. Chudinov A.N., 1910. Mollusks Novolatinsk. Mollusca, from dates. Mollis, soft. Softwood animals. Explanation ... ... Dictionary of foreign words of the Russian language

- (from lat. Molluscus soft) (soft) type of invertebrate animals. The body from most clams is covered with a sink. On the abdominal side, a muscular foot will grow up (the organ of movement). 2 subtypes: Sneakers and shells; sv. 130 thousand species. Live in ... ... Big Encyclopedic Dictionary

Modern encyclopedia

Mollusks - Mollusks, type of invertebrate animals. Most is covered with a sink. The head has a mouth, tentacles and often eyes. Muscular increase (leg) on \u200b\u200bthe abdominal side serves to crawl or swimming. About 130 thousand species, in the seas (most), ... ... Illustrated Encyclopedic Dictionary

- (Mollusca) The type of animals with a solid non-vigorous body Most of the representatives have a lime sink, solid or consisting of two, less often several separate parts. The organ of movement is a muscular unpaid ... ... Geological Encyclopedia

mollusks - The body at the majority of m. covered with a sink. ▼ Sneakers. Pacar: Hiton tonic. Solenogastras: echinomation. Caudopoveats. Shells. Monoplacoforas: nonopiline. Labor, snails, gastryports: Front-chamber: Kauri. Littoric. Sea ears. Trumpeters ... The ideographic dictionary of the Russian language

mollusks - Type of soft non-empty invertebrate animals, usually distinguishing the substance for building limestone sinks: snails, skewers, doubles, chitons, squid. ... ... Technical translator directory

- (Mollusca) (from lat. Molluscus soft), soft, type of invertebrate animals. 7 classes: Labor clay, monoplastic, shellfish, grooves, gnawed mollusks, gluttonous mollusks and ... Great Soviet Encyclopedia

Mollusks

Mollusks, Representatives of more than 80,000 species of invertebrate animals like Mollusca. These include well-known snails, bivalve mollusks and squid, as well as many less well-known species. Initially, the inhabitants of the sea, mollusks are now found in the oceans, in fresh water And on land. The classes of mollusks include: primitive buchelonium mollusks, single-holder (slugs and snails), bivalve mollusks, glotonyhide mollusks and cephalopod (squid, etc.). The body of the mollusk consists of three parts: head, leg and torso. There is also a skin fold attached to the body, called mantia,the producing limestone shell (sink) characteristic of most mollusks. The head is well developed only in snails and chason, having eyes, tentacles and well-formed mouth. The body includes internal blood circulation organs (blood vessels and heart), breathing (gills), isolation (kidney) and reproduction (sex glands). Mollusks usually separately, but there are many types of hermaphrodites. Champion, bivalve and brojonogi mollusks are important fossil fossils - testimonies of the geological past. see alsoHermaphrodites.

Mollusks. Wonderful experts in studying a new habitat, snails, lived earlier in the sea, but gradually about 22,000 species adapted to life on land, losing the gills and developing the lungs breathing air. Most of the types of land snails, such as Helix Pomatia's grape snail, depicted here, live on Earth, have a non-launch of color, there are several wood species that tend to bright color. Other species returned to life in water and should periodically pop up to the surface to inhale.

Scientific and Technical Encyclopedic Dictionary.

Watch what is "mollusks" in other dictionaries:

Modern encyclopedia

Books

J.L. Cuvier. The kingdom of animals. Mollusks, R. Aldonin. This publication introduces the reader with the section `Mollusks` From the four-volume work of the French Naturalist and the naturalist of Georges-Leopold Cuvier` The kingdom of animals, distributed according to ...

Mollusks belong to one of the most ancient invertebrate animals. Differ in the presence of a secondary cavity and quite difficult to arranged internal organs. Many of them have a lime sink, which pretty well protects their body from the encroachment of numerous enemies.

Not so often they remember this, but a lot of types of this type lead a predatory lifestyle. The developed salivary iron helps them. By the way, what is the salivary iron from the mollusks? Under this generalizing concept, a rather extensive spectrum of specific organs located in the throat and the oral cavity is meant. They are intended to secrete various substances whose characteristics can be very different from our understanding of the word "saliva".

As a rule, mollusks have one or two pairs of such glands, which in some species achieve very impressive sizes. Most of the predatory species in the secret, which they allocate, is contained from 2.18 to 4.25% of chemically pure sulfuric acid. It helps how to fight back from predators, and hunting on their relatives (sulfuric acid perfectly dissolves their lime sinks). That's what salivary iron in the mollusks.

Other natural significance

Many of the types of slugs, as well as a grape snail, make tremendous harm to agriculture around the world. At the same time, it is the mollusks that play a crucial role in global water purification, since the organic filtered from it is used to supply them. In many countries large bred on marine farms, as they are valuable food Productwhich contains a lot of protein. These representatives and oysters) are used even in dietary nutrition.

IN former USSR Rare and disappearing were considered 19 representatives of this ancient type. Despite the diversity of mollusks, it should be treated carefully, since they are extremely important for the proper functioning of many natural biotopes.

In general, mollusks are often distinguished by the most important practical meaning for humans. For example, the pearls are massively divorced in many seaside countries, since this species is a supplier of a natural pearl. Some mollusks are greater value for medicine, chemical and processing industry.

Want to know interesting Facts about mollusks? IN Antique period And the Middle Ages inconspicuous cephalopods were sometimes the basis of the well-being of whole states, as of them was mined the most valuable purple, who were painted royal mantles and robes for nobility!

Type of mollusks

In total, it has more than 130,000 species (yes, the diversity of mollusks is incredible). Mollusks in total are inferior only by arthropod, are the second most prevalence in alive organisms on the planet. Most of them live in water, and only a relatively small number of species elected the place of their stay.

general characteristics

Almost all animals that are part of this type differ in several specific features. Here is the general characteristic of mollusks today:

First, three-layerness. Their organ system is formed from Etoderma, Entoderm and Mesoderm.
The symmetry of bilateral type caused by a significant displacement of most of their organs.
The body is non-substituted, in most cases protected by a relatively solid lime sink.
There is a skin fold (mantle), which envelops all their body.
For movement serves a well-pronounced muscular increase (leg).
The organic cavity is very poorly expressed.
There are practically all the same organ systems (in a simplified version, of course), like the highest animals.

Thus, the overall characteristic of mollusks indicates that in front of us are quite developed, but still primitive animals. It is not surprising that it is Mollusks that many scientists consider the major ancestors of a large number of living organisms on our planet. For clarity, we give a table in which the characteristics of the two most common classes describe in more detail.

Characteristics Labor and bivalve species

Considered feature	Classes of mollusks
Considered feature	Bivalve	Poultry
Type of symmetry	Bilateral.	Symmetry is absent, some organs are fully reduced.
The presence or absence of a head	Fully atrophied, like all system systems that historically treated it.	There is, like the entire set of organs (mouth cavity, eyes).
Respiratory system		Zhabra or Light (Prudovik, for example).
Type of shell	Bivalve.	One piece, can be twisted in different directions (strip, ampuilory) or in a spiral (lake coil).
Sexual dimorphism, genital system	Separations, males are often smaller.	Hermaphrodites, sometimes separately. Diorsphism is expressed weakly.
Power type	Passive (water filtration). In general, these clams in nature contribute to excellent water purification, as tons of organic impurities are filtered off from it.	Active, there are predatory species (cones (lat. Conidae)).
Habitat area	Sea and fresh reservoirs.	All types of water bodies. There are also terrestrial clams (grape snail).

Detailed characteristic

The body is still symmetrically, although two-minded species are not observed. The separation of the body into segments is preserved only in very primitive species. The secondary cavity of the body is represented by a bag surrounding the heart muscle and genitals. The entire space between the organs is fully filled with Parenkhima.

The majority can be divided into the following departments:

Head.
Torso.
The muscular foot through which movement is carried out.

All bivalve species have a fully reduced head. Under the foot is meant a massive muscular process, which develops from the base of the abdominal wall. At the very base of the body, skin cover forms a large fold, mantle. Between it and the body there is a fairly large cavity, in which the following organs are placed: the gills, as well as the conclusions of sexual and excretory systems. It was the mantle that secretes those substances that, enhancing the reaction with water, form a solid sink.

The sink can be both completely solid and consist of two sash or several plates. The composition of this shell includes a lot of carbon dioxide (of course, in the associated state - Caso 3), as well as a konchiolin, a special organic matter, which is synthesized by the body of mollusk. However, many types of mollusks of the sink are completely or partially reduced. Slugs from it remained only the microscopic dimensions of the plate.

Characteristics of the digestive system

Brojonogi mollusks

At the front end of the head there is a mouth. The main body in it is a powerful muscular language, which is covered with a particularly solid chitinular grater (Radule). With its help, the snippet is scrapeting algae or other organics from all available surfaces. In predatory species (we will talk about them below) The language was reborn into flexible and hard trull, which is intended to open the shells of other clams.

The cones (about them will also be said separately) separate segments of the Radules protrude beyond the rice of the oral cavity and form a kind of harpoon. With their help, these representatives of mollusks literally throwing their victim poison. Some predatory buchelopus have turned into a special "drill", which they are literally drilled in the sink of their production of holes for injection of poison.

Bivalve

In their case, everything is much easier. They simply lie on the bottom (or hang, tightly attached to the substrate), filing through her body hundreds of liters of water with an organ-dissolved organic. Filtered particles come directly into the bulk stomach.

Respiratory system

Most of the species breathes with gills. There are "front" and "rear" species. The first gills are located in the front of the body and their top is aimed forward. Accordingly, in the second case, the top looks back. Some lost the gills in the direct understanding of this word. These big mollusks breathe right through the skin.

To do this, they developed a special adaptive type skin. In the land species and secondary aqueous clams (their ancestors returned to the water again) part of the mantle wocks, forming a peculiar light, the walls of which densely penetrated with blood vessels. To ride, such snails rose to the surface of the water and gain air reserve with the help of a special breathaf. The heart located not far from the simplest "design" consists of one atrium and ventricle.

Basic classes included in the type of type

How is the type of mollusks divided? Classes of mollusks (all of their eight pieces) "crowned" three are most numerous:

Labor (Gastropoda). These include thousands of types of snails of all sizes, the main distinctive feature Which is the low speed of movement and a well-developed muscular leg.
Bivalves (Bivalvia). Sink from two sash. As a rule, all-in-class species are settled, sedentary. Move can be moved both with a muscular leg and by means of reactive traction, throwing water under pressure.
CHONEGOGE (CEPHALOPODA). Millarmers, sinks or devoid at all, or it is in its infancy.

Who else is in the mollusk type? The classes of mollusks are quite diverse: apart from all of the above, there are still leopaped, shell and yamkvyvy, furochychychychi and monoplastic phones. All of them belong to the living and healthy.

What fossils contains a type of mollusks? Classes classes that have already been extinct:

RostroConchia.
Tentaculites.

By the way, the same monoplastic phones were considered completely extinct until 1952, but at that time the Galatei vessel with a research expedition on board caught several new organisms that were attributed to the new appearance of Neopilina GalaTheae. As you can see, the name of the mollusks of this species was given by the name of the research vessel, which they discovered them. However, in scientific practice it is not uncommon: species are much more referred to in honor of the researcher discovered.

So it is possible that all subsequent years and new research missions will be able to enrich the type of mollusks: classes of mollusks that are now considered extinct, may well be maintained somewhere in the bottomless depths of the world's ocean.

No matter how strange it sounded, but one of the most dangerous and incredible predators on our planet is considered ... externally innocuous buchetic clamsters. For example, snails cones (Lat. Conidae), the poison of which is so unusual that modern pharmacists are used in the manufacture of certain types of rare drugs. By the way, the name of the mollusks of this family is fully justified. Their form is in fact most like a truncated cone.

They can be aggressive hunters, extremely ruthlessly straightening with flooding prey. Of course, colonial, sedentary species of animals are more often in the role of the latter, as they simply do not get angry behind other snails. The victim itself can exceed tens of times a hunter. Want to know more interesting facts about mollusks? Yes please!

On the methods of hunting snails

Most often, the cunning mollusk uses its most powerful organ, strong muscular foot. It can be attached to mining with force equivalent to an effort in 20 kg! The predatory snail is quite enough. For example, the "caught" oyster is revealed in less than an hour at an effort only in a tet kilograms! In short, the life of mollusks is much more dangerous than this is customary to think ...

Other types of bruhogs and prefer to put anything at all, carefully drilling the sink of mining using a special trunk. That's just the process of this simple and rapidly not to call with all the desire. So, with the thickness of the shell, only 0.1 mm drilling can take up to 13 hours! Yes, this method of "hunting" is suitable exclusively for snails ...

Dissolution!

To dissolve someone else's sink and its owner, the mollusk uses sulfuric acid (you already know what salivary iron is in mollusks). So destruction is much easier and faster. After the hole is done, the predator begins not in a hurry to eat his prey from the "packaging", using his trunk for this. To some extent, this organ can be considered an analogue of our hand, as it is directly involved in the seizure and retention. In addition, this manipulator can often stretch out so that exceeds the length of the body of the hunter itself.

That is how the snails can get their prey even from deep gaps and big shells. Once again we remind you that it is from a trunk in the body of the victim injects a strong poison, the basis of which is chemically pure sulfuric acid (allocated from the "harmless" salivary glands). In short, you're surely know exactly what salivary iron in mollusks and what they need it.

Answer questions: 1. What did the mollusks get their name? 1. What mollusks got their name? 2. What mollusks live in our area? 2. What mollusks live in our area? 3. What is the meaning of mollusks in the nature and life of a person? 3. What is the meaning of mollusks in the nature and life of a person?

Molluster Type Class Pancir Class Furochilding Class Lopadamy Class Bivalve Class Bracheumogue Class Monopolophore Class CHONONAGE

Bucheloga Hallburse Mollusk Grape Snail Neptune Desphet Lyambis Isillipieda (species) Slisen field

Bivalve pearl sea thidakna large (250 kg) Mulidia Graya Edible mollusks (species)

Blue-dovely octopus - Woofs from the coast of Australia to 20 cm, weight up to 100 g -Ukus deathly, poison causes a palsy musculature for 30 minutes. Nutritional and delicious foods from squid, scallops, mussels, hearts and coastal snails

Answer the questions: 1. Assign how the clams are adapted to their habitat? 1. Finds how the mollusks are adapted to their habitat? 2. What are the features of the similarities and differences in the buccular and bivalve mollusks? 2. What are the features of the similarities and differences in the buccular and bivalve mollusks? 3. Transfer the ways to protect against the enemies of the mollusks known to you. 3. Transfer the ways to protect against the enemies of the mollusks known to you. 4. What allows the chart quickly move in water and escape from enemies? 4. What allows the chart quickly move in water and escape from enemies?

Who are mollusks. Type and classes of mollusks. The overall characteristic of mollusks. What is salivary iron from mollusks? On the methods of hunting snails

Watch what is "mollusks" in other dictionaries:

Watch what is "mollusks" in other dictionaries:

Books

Other natural significance

Type of mollusks

general characteristics

Detailed characteristic

Characteristics of the digestive system

Brojonogi mollusks

Bivalve

Respiratory system

Basic classes included in the type of type

On the methods of hunting snails

Dissolution!

Last

It is necessary to know