what structure secretes the shell of a mollusk
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Radula Mollusk: Mollusk, any soft-bodied invertebrate of the phylum Mollusca, usually wholly or partly enclosed in a calcium carbonate shell secreted by a soft mantle covering the body. Along with the insects and vertebrates, it is one of the most diverse groups in the animal kingdom, with nearly 100,000 (possibly
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How is the radula of a mollusk adapted to its function? Radula is a digestory organ, its function is to grate and break food. Its main adaptation is having all these series of teeth all over it, which help the mollusk in the digestion. It has a hyaline shield, made of chitin, that helps the radula's muscles to attach. These are atribbutes common to almost all radula-bearing mollusks. Different groups have different eating habits, which lead to different selective pressures, and consequently, different radulas.
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- Phylum Mollusca shows variations on a common body plan, with a muscular foot, a mantle that secretes the shell, a visceral mass, and a radula, a feeding organ unique to the phylum. 1  They are bilateral protostome coelomates, and comprise the second-most diverse animal phylum (150,000 sp.).2  Three major classes are:hylum Mollusca shows variations on a common body plan, with a muscular foot, a mantle that secretes the shell, a visceral mass, and a radula, a feeding organ unique to the phylum. 1  They are bilateral protostome coelomates, and comprise the second-most diverse animal phylum (150,000 sp.). 2  Three major classes are:
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What Is A Shell? Mollusks are classified into major groupings according to the characteristics of their shells. Snails (Gastropoda) have a single shell which spirals outward and to one side as it grows. Most Cephalopoda (octopi and squid) have no shell, but the Chambered Nautilus of that group has a shell.
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Research paperThe mantle, ink sac, ink, arm hooks and soft body debris associated with the shells in Late Triassic coleoid cephalopod Phragmoteuthis from the Austrian Alps A precondition for the presence of the arm hooks and ink sac together with the shell is the burial of complete individuals including their soft parts. As the pro-ostracum was covered by the mantle, with the soft body underneath, the latter might have been “glued” to the pro-ostracum by diagenetic compaction.
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- in which they live or from the food the mollusks eat. common forms of calcium carbonate, aragonite and calcite. in crystal shape, but their chemical formula is the same. the two forms, calcite, is found in the hard, outer shell of the oyster.
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Where do snails get their shells from? A snail, like most other mollusks, uses its mantle to make its shell. To make a shell, the mantle releases a liquid made up of shell materials. Gradually the liquid hardens and forms the shell. Over time, the mantle releases more of this liquid.
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What is a bivalve mollusk? An internal organ called the mantle secretes calcium carbonate so that as the inner invertebrate grows, the outer shell provides a roomier home. Many bivalve species play important roles in aquatic and marine ecosystems by filtering the water and serving as habitat and prey for a variety of sea life. roughfile clam from the Flower Garden Bank National Marine Sanctuary—just one of many different bivalve mollusk species. Like fish, bivalve mollusks breathe through their gills. As filter feeders, bivalves gather food through their gills.
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- Seashell Basics. Seashells are the protective exoskeletons of mollusks. They shelter the body from predators and other potential dangers.Seashells are made almost entirely of calcium, but also have a small amount of protein.eashell Basics. Seashells are the protective exoskeletons of mollusks. They shelter the body from predators and other potential dangers.
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Molluscs 14. Some molluscs, such as bivalves and gastropods, secrete an external calcareous shell. Calcium carbonate is secreted by the mantle, a fold in the epidermis, forming the shell. In pelecypods, the shell is made of moving parts that contain the body between them.In gastropods, the shell only contains the visceral mass.4. Some molluscs, such as bivalves and gastropods, secrete an external calcareous shell. Calcium carbonate is secreted by the mantle, a fold in the epidermis, forming the shell. In pelecypods, the shell is made of moving parts that contain the body between them.
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What Is a Mantle in the Body of a Mollusk? In mollusks that have shells, such as clams, mussels, and snails, the mantle is what secretes calcium carbonate and a matrix to form the mollusk's shell. In mollusks that lack shells, such as the slug, the mantle is completely visible. In some mollusks with shells, you can see the mantle extending from under the shell.
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- Body Plan. Mollusks have a thin layer of tissue called the mantle. The mantle covers the body organs, which are located in the visceral mass. Between the soft body and the mantle is a space called the mantle cavity.
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- Other gastropod species have developed the ability to breathe air later. All marine gastropods, as well as some fresh water gastropods, breathe with gills. Snails originally possess the so-called comb-gills (ctenidia), which are also located in the pallial cavity.nails' excretion organs originally were derived from the segmented worms' (Annelida) metanephridia. While water snails excrete a very much diluted primary urine, terrestrial pulmonate snails have developed the ability to resorb most of the water.
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Operculum (gastropod) The operculum is attached to the upper surface of the foot and in its most complete state, it serves as a sort of trapdoor to close the aperture of the shell when the soft parts of the animal are retracted.The shape of the operculum varies greatly from one family of gastropods to another.any families have opercula that are reduced in size, and which are not capable of closing the shell aperture. Opercula have sometimes been modified: in the Strombidae the operculum is claw-shaped and is used to push into the substrate in a leaping form of locomotion.
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- Nacre is composed of an organic, horn-like compound called conchiolin, and calcium carbonate (CaCO 3) in the form of the minerals aragonite or calcite. All species of bivalves are capable of producing pearls, but only a few can secrete a nacreous coating that has the attractive pearly luster of gem pearl.
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Scientific Method: Conclusion August 22, 2010 By Janice VanCleave. A conclusion is a summary of the experiment. For a cause-effect experiment, the conclusion should state the hypothesis and and tell whether the results of the experiment supported the hypothesis. If the results did not support your hypothesis, say so, and then add information about why this happened. For Example: If the cause-effect experiment has the following problem, hypothesis,data, and results, the conclusion might be stated as shown below:
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Bivalves Bivalves. The mollusks that have a hinged, two-part shell joined by strong muscles are called bivalves. Clams, Oysters, and Scallops are bivalve mollusks and are a familiar food source. These three animals pull their shells closed by contracting powerful muscles near the hinge.The open these shells they have to relax their muscles.lams, Oysters, and Scallops are bivalve mollusks and are a familiar food source. These three animals pull their shells closed by contracting powerful muscles near the hinge. The open these shells they have to relax their muscles.
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Bivalve shell It is secreted by a part of the molluscan body known as the mantle. Bivalve shells are collected by professional and amateur conchologists and are sometimes harvested for commercial sale in the international shell trade or for use in glue, chalk, or varnish, occasionally to the detriment of the local ecology.t is secreted by a part of the molluscan body known as the mantle. Bivalve shells are collected by professional and amateur conchologists and are sometimes harvested for commercial sale in the international shell trade or for use in glue, chalk, or varnish, occasionally to the detriment of the local ecology.
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List of the Three Major Body Regions of a Mollusk The Foot. A mollusk has a foot, the body's muscular section, responsible for movement. The foot of some mollusks has also adapted to attaching to rocks and grasping prey. To ease movement, mollusks such as snails and slugs release secretions from their feet, then slide along the mucus, forming a trail.
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Body Plan Body Plan. Mollusks have a thin layer of tissue called the mantle. The mantle covers the body organs, which are located in the visceral mass. Between the soft body and the mantle is a space called the mantle cavity. Mollusks contain gills.Gills are organs in which carbon dioxide from the mollusk is exchanged for oxygen in the water. The mantle also protects the body if the mollusk does not have a shell. the shell is made up of several layers.he mantle covers the body organs, which are located in the visceral mass. Between the soft body and the mantle is a space called the mantle cavity. Mollusks contain gills. Gills are organs in which carbon dioxide from the mollusk is exchanged for oxygen in the water.
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Bivalves The mollusks that have a hinged, two-part shell joined by strong muscles are called bivalves. Clams, Oysters, and Scallops are bivalve mollusks and are a familiar food source.These three animals pull their shells closed by contracting powerful muscles near the hinge. The open these shells they have to relax their muscles.ephalopods are the only mollusks that have closed circulatory system, which the blood contains food and oxygen that moves through the body in a series of closed vessels. Just like a human's blood that moves through their blood vessels.
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- How much does an elephant's ear weigh? Up to 110 pounds (50 kg) each. Not a chance of my quitting with that simple fact. The enormous (6- by 4-foot, 1.8 m by 1.2 m) flaps extend the length of the animal's head and out almost as far.
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Body Structure and Symmetry The visceral mass is the fleshy, boneless, body of the mollusk which contains all the internals of mollusks such as digestive system, excretory system and circulatory system. The tissues of the organs are covered by a mantle. It is a skin-like organ that holds the materials in the shell.ollusks have a body without a cavity, has more than two layers of cell layers, tissues and organs. Mollusks are soft bodied animals with three main regions: head, visceral mass, and foot. The head of the mollusk contains the sense organs such as the brain. It has a pair of eyes, a mouth, sensory and nervous structures.
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Scleractinia The individual animals are known as polyps and have a cylindrical body crowned by an oral disc surrounded by a ring of tentacles. The base of the polyp secretes the stony material from which the coral skeleton is formed. The body wall of the polyp consists of mesoglea sandwiched between two layers of epidermis.
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- Body Plan. Mollusks have a thin layer of tissue called the mantle. The mantle covers the body organs, which are located in the visceral mass. Between the soft body and the mantle is a space called the mantle cavity.Mollusks contain gills.ollusks have a thin layer of tissue called the mantle. The mantle covers the body organs, which are located in the visceral mass.
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What is a mollusk shell made of? Merge this question into. Split and merge into it. Answer by Quirkyquantummechanic. Confidence votes 77.6K. Almost all of a mollusk shell is composed of calcium carbonate. It may take a few different forms and thereby appear differently, but CaCO3 is the main material in the shell.