what is the main function of the bivalves
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Mantle (mollusc) The mantle cavity is a central feature of molluscan biology. This cavity is formed by the mantle skirt, a double fold of mantle which encloses a water space. This space contains the mollusc's gills, anus, osphradium, nephridiopores, and gonopores. The mantle cavity functions as a respiratory chamber in most molluscs.In bivalves it is usually part of the feeding structure. In some molluscs the mantle cavity is a brood chamber, and in cephalopods and some bivalves such as scallops, it is a locomotory organ.The mantle is highly muscular.he mantle cavity is a central feature of molluscan biology. This cavity is formed by the mantle skirt, a double fold of mantle which encloses a water space. This space contains the mollusc's gills, anus, osphradium, nephridiopores, and gonopores. The mantle cavity functions as a respiratory chamber in most molluscs.
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How do bivalves make pearls ? Best Answer: Bivalve mollusks, from the class Bivalvia, are known as pearl-producing mollusks. There are approximately 20,000 species of bivalves, and they live in both marine and freshwater environments.
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What is a bivalve mollusk? A 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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- Like fish, bivalve mollusks breathe through their gills. As filter feeders, bivalves gather food through their gills. Some bivalves have a pointed, retractable foot that protrudes from the shell and digs into the surrounding sediment, effectively enabling the creature to move or burrow.
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Japanese flying squid Adult squid have several distinguishing features. The mantle encloses the visceral mass of the squid, and has two fins, which are not the primary method of propulsion. Instead, the squid has a siphon, a muscle which takes in water from one side, and pushes it out the other side: jet propulsion.
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Choanocytes: Definition & Functions The primary function of choanocytes is to assist with circulation. The flagellum on each choanocyte whips back and forth, which creates water movement. This water current helps circulate seawater within and through the sponge.
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What is a bivalve mollusk? Like fish, bivalve mollusks breathe through their gills. As filter feeders, bivalves gather food through their gills. Some bivalves have a pointed, retractable foot that protrudes from the shell and digs into the surrounding sediment, effectively enabling the creature to move or burrow.Bivalves even make their own shells.s filter feeders, bivalves gather food through their gills. Some bivalves have a pointed, retractable foot that protrudes from the shell and digs into the surrounding sediment, effectively enabling the creature to move or burrow. Bivalves even make their own shells.
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- The bivalves (meaning two-shells) are perhaps the most well known mollusks simply because of their history as a source of food. Clams, mussels, oysters and scallops are all bivalves. There are about 15,000 known species of bivalve, with about 80% of them being marine (the rest are found in fresh water).ollusks usually have a shell (although some do not). Mollusks also have an extension of the body wall called the mantle. This portion of the animal's anatomy is responsible for secreting the shell. The mantle encloses the mantle cavity which contains the Ctenidia (gills), anus and excretory pores.
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- Since bivalves ﬁlter their food fromthe water, they are examples of filter feeders. As filter feeders,bivalves are responsible for ﬁltering, and thereby cleansing, greatquantities of seawater.Bivalves are adapted to breathe underwater by using gill mem-branes. In function, gills are like your lungs.
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- Bivalve. Bivalve. 1. (Science: marine biology) a mollusk having a shell consisting of two lateral plates or valves joined together by an elastic ligament at the hinge, which is usually strengthened by prominences called teeth.ivalve; bi- (L. Bis) _ valve valve. Please contribute to this project, if you have more information about this term feel free to edit this page. This page was last modified on 3 October 2005, at 21:16.This page has been accessed 7,992 times.
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A List of Mollusks The bivalve family of mollusks consists primarily of clams, scallops and other ocean creatures that have a hinged shell. That hinged shell is the hallmark of bivalves, and the shell is produced by the mollusk itself. As it grows, the mollusk secretes calcium carbonate, constantly rebuilding the shell.
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Mollusks B. Mollusks with 2 shells can clap shells together to swim C. Some creep along moist areas on slime E. Gastropods 1. They move by sending waves of contractions along its muscular foot. 2. A film of mucus lubricates and propels F. Bivalves 1. Don't move much 2. If threatened they either use muscular foot to burrow into sediment or jet propulsions to flee
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- Bivalve molluscs are so-called because their shell is divided into two articulated valves (compare them to gastropods and cephalopods, which are also molluscs). In large bivalves, such as scallops and large clams, the valves are corrugated to give them extra mechanical strength. Most bivalves are not capable of active swimming and most are burrowing animals, using their muscular foot to excavate a burrow in soft sediments (some bore into corals and similar hard materials).
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- More detailed information about bivalve shells can be found here. The valve structure and soft anatomy of the bivalves varies among species. The Hard-Shelled Clam or Cherrystone, Mercenaria mercenaria, is used here as an example of a typical bivalve.Important features of bivalve shells are: 1  two shelly valves.ore detailed information about bivalve shells can be found here. The valve structure and soft anatomy of the bivalves varies among species. The Hard-Shelled Clam or Cherrystone, Mercenaria mercenaria, is used here as an example of a typical bivalve.
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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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What Is A Shell? Just as important as protection and rigidity, is the assistance a shell renders its maker in pursuit of the necessities of its life. Some shell shapes are streamlined for ease of burrowing through mud or sand. Some bivalves are heavily ridged in ways that help them stay anchored in the bottom where they live.
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Bivalvia Brachiopods are shelled marine organisms that superficially resembled bivalves in that they are of similar size and have a hinged shell in two parts. However, brachiopods evolved from a very different ancestral line, and the resemblance to bivalves only arose because of a similar lifestyle.y the middle of the Paleozoic, around 400 million years ago, the brachiopods were among the most abundant filter feeders in the ocean and over 12,000 fossil species are recognized. By the Permian–Triassic extinction event 250 million years ago, bivalves were undergoing a huge radiation of diversity.
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- Scallops have a very well developed adductor muscle. The adductor muscle connects the two valves and closes the shell valves together when it contracts. Bivalves generally have one pair of these muscles, one anterior and one posterior, but only the posterior adductor muscle is developed in scallops.
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Bivalvia Empty shells of the sword razor. (Ensis ensis) Bivalvia, in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class of marine and freshwater molluscs that have laterally compressed bodies enclosed by a shell consisting of two hinged parts.
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Giant clam fact file This enormous shellfish is the largest species of bivalve mollusc in the fossil record, and the heaviest of all the living molluscs. Like all bivalve molluscs, the shell of the giant clam (Tridacna gigas) consists of two valves, although in the larger giant clams these cannot close completely.
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What is a bivalve mollusk? As filter feeders, bivalves gather food through their gills. Some bivalves have a pointed, retractable foot that protrudes from the shell and digs into the surrounding sediment, effectively enabling the creature to move or burrow. Bivalves even make their own shells.
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- Answer   Bivalves are mollusks belonging to the class Bivalvia. They typically have two-part shells, with both valves being symmetrical along the hinge line. The cl…ass has 30,000 species, including scallops, clams, oysters and mussels. Other names for the class include Bivalva, Pelecypoda, and Lamellibranchia.
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Definitions &Translations Wiktionary (0.00 / 0 votes) Rate this definition: bivalve (Noun). Any mollusc belonging to the taxonomic class Bivalvia, characterized by a shell consisting of two hinged sections, such as a scallop, clam, mussel or oyster.
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The Animal Kingdom The rest of the body contains various organs involved in reproduction, circulation, digestion, and other important processes. Covering most of the univalves’ body is a soft mantle. The mantle produces the material that makes up the hard shell. As the animal grows, the mantle becomes larger in order to house the animal. Class Bivalvia
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- Radula specific to snails (from Latin radere - to scrape) Most Mollusks (with the exception of bivalves) have a specialized feeding organ within the mouth called the radula. The mouth opens into a pocket-like buccal cavity. Inside this cavity is the radula sac which protects the mouth when the radula is not in use. Supporting the radula is a structure of cartilage called the odontophore. Controlled by muscles, it is capable of being thrust forward and retracted in a rhythmic motion for feeding and retracted when finished. As for the radula itself.
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What is a bivalve mollusk? A 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.Some bivalves have a pointed, retractable foot that protrudes from the shell and digs into the surrounding sediment, effectively enabling the creature to move or burrow.Bivalves even make their own shells. 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.