A bicuspid aortic valve may cause the heart's aortic valve to narrow (aortic valve stenosis). It is broken down into many fields, reflecting the complexity of life from the atoms and molecules of biochemistry to the Biology Dictionary provides definition, examples and quiz for common biology terms, including molecular biology, cell biology, Taxonomic Retrospect 4. 1. noun biology A boss, or rounded elevation, or a corresponding depression, in a palate, disk, or membrane; as, the umbo in the integument of the larvæ of echinoderms or in the tympanic membrane of the ear. Bivalve molluscs are abundant in marine and freshwater ecosystems and perform important ecological functions. Jennifer Kennedy, M.S., is an environmental educator specializing in marine life. Radial Symmetry – Refers to an organism, which has several planes that it could be cut through, to produce roughly identical pieces. Meaning of bivalve. bivalve (bī′vălv′) n. Any of numerous freshwater and marine mollusks of the class Bivalvia, having a shell consisting of two hinged valves connected by a ligament, and including the clams, mussels, oysters, and scallops. The bivalve's two siphons are situated at the posterior edge of the mantle cavity. Developmental Biology 329 (1): 152 – 166. mantle cavity. Lindner, … 2. organisms with body shapes that are mirror images along a midline called the sagittal plane Intertidal Zone Characteristics, Challenges, and Creatures, Nudibranch Sea Slugs: Species, Behavior, and Classifications, M.S., Resource Administration and Management, University of New Hampshire, B.S., Natural Resources, Cornell University. Many bivalves feed by filter feeding, in which they draw water over their gills, and tiny organisms collect in the organism's gill mucus. Â. Bivalves are found in the Phylum Mollusca, Class Bivalvia. Bivalve ecology is a large field of study, but few comparisons among aquatic ecosystems or lifestyles have been conducted. adj. Bivalve definition, any mollusk, as the oyster, clam, scallop, or mussel, of the class Bivalvia, having two shells hinged together, a soft body, and lamellate gills. Clam Dissection Introduction The phylum Mollusca includes snails, clams, chitons, slugs, limpets, octopi, and squid. See more. valve (plural valves) 1. bivalve, aquatic mollusk of the class Pelecypoda ("hatchet-foot") or Bivalvia, with a laterally compressed body and a shell consisting of two valves, or movable pieces, hinged by The also breathe by drawing fresh oxygen from the water as it passes over their gills. 1 people chose this as the best definition of valve: The definition of a valve... See the dictionary meaning, pronunciation, and sentence examples. 1 people chose this as the best definition of valve: The definition of a valve... See the dictionary meaning, pronunciation, and sentence examples. 2. 1. STUDY. Some knowledge of bivalve biology is necessary to understand operations of a bivalve hatchery and to assist in solving problems that arise. The embryos develop in the water column and go through a larval stage before eventually developing their shell.Â, Bivalves are some of the most important seafood species. Excretory System 9. She serves as the executive director of the Blue Ocean Society for Marine Conservation. Usually water enters the mantle cavity through the inhalant siphon, moves over the gills, and leaves through the exhalant siphon. Having a shell consisting of two hinged valves. adj. Learner's definition of BIVALVE [count] biology: a sea animal that has a shell with two movable parts connected by a hinge. The image shows the shell and internal body of a bivalve mussel. It also forms a mantle Number and Size 7. The hinge margin is typically united by a non-calcified ligament and a set of articulating hinge teeth. A bivalve is an animal that has two hinged shells, which are called valves. All bivalves are mollusks. Examples of bivalves are clams, mussels, oysters, and scallops. The most primitive bivalves were probably deposit feeders, collecting detritus from the sediment surface. The symmetry of the two halves of the shell can be seen in the bottom image. (Zoöl.) The first thing that mig… adj. Some bivalves have separate sexes, some are hermaphroditic (have male and female sex organs). Bivalve mollusks (e.g., clams, oysters, mussels, scallops) have an external covering that is a two-part hinged shell that contains a soft-bodied invertebrate A bivalve is an animal belonging to the class Bivalvia. the blood-filled space or body cavity of some invertebrates. The mantle of mollusks and brachiopods secretes the shell in species that possess shells. 2. Having a shell consisting of two hinged valves. The water is circulated by the action of the gills. You likely know them as shellfish. Mollusks also have a radula or file-like organ for feeding, a mantle that may … Continue reading "Clam Dissection" Venus shell definition: a marine bivalve mollusc of the family Veneridae , typified by the intertidal Venus... | Meaning, pronunciation, translations and examples bivalve definition in English dictionary, bivalve meaning, synonyms, see also 'bivalvate',bivalent',bivalence',bivalency'. the fluid that circulates through the body of an animal that has an open circulatory system. ADVERTISEMENTS: In this article we will discuss about Phylum Mollusca:- 1. (biology: variety of mollusc) bivalvo nm nombre masculino : Sustantivo de género exclusivamente masculino, que lleva los artículos el o un en singular, y los o unos en plural. When you eat a shelled bivalve, you're eating the body or a muscle inside. When you're eating a scallop, for example, you're eating the adductor muscle. Habituation may The scrotum is a sac of skin that contains several important parts of the male reproductive system. STUDY. There is an inhalant or incurrent siphon, and an exhalant or excurrent siphon. The mantle of mollusks and brachiopods secretes the shell in species that possess shells. The valves of the clam may be over 4 feet long, and the clam itself may weigh over 500 pounds. The valves lie on the left and right sides of the animal. « Bivalve » redirige ici. noun zoology One of the lateral prominence just above the hinge of a bivalve shell. Close its shell valve may cause the heart 's aortic valve stenosis ) and leaves through the exhalant siphon that... Organism inside gets bigger of an internal combustion engine, or one that allows combustion bivalve definition biology. 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