Bivalve definition zoology
Webbivalve in British English. 1. Also: pelecypod, lamellibranch. any marine or freshwater mollusc of the class Pelecypoda ( formerly Bivalvia or Lamellibranchia ), having a laterally compressed body, a shell consisting of two hinged valves, and gills for respiration. The group includes clams, cockles, oysters, and mussels. 2. WebMay 23, 2024 · Bivalve molluscs belong to the class Bivalvia (or Lamellibranchia) of the phylum Mollusca. Known by such common names as clams, mussels, cockles, oysters, …
Bivalve definition zoology
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WebBivalves are distinguished from other molluscs by being having laterally compressed bodies encased in two shells (valves) that are held together by a dorsal hinge ligament (6) that causes the valves to open ventrally. The valves are drawn together by a pair of anterior (2) and posterior (8) adductor muscles, which are the parts of edible ... Webbivalve - WordReference English dictionary, questions, discussion and forums. All Free. WordReference.com Online Language Dictionaries. English Dictionary bivalve ... Zoology having two shells, usually united by a hinge. having two similar parts hinged together. 1670–80; bi-1 + valve;
WebJul 12, 2024 · Borut Furlan/Getty Images. Sea stars have clear tube feet that extend from ambulacral grooves in the sea star's oral (bottom) surface. The sea star moves using hydraulic pressure combined with adhesion. It sucks in water to fill up the tube feet, which extends them. To retract the tube feet, it uses muscles.
WebMar 27, 2024 · Incurrent and excurrent siphons are the tubular structures that burrowing bivalve molluscs, such as clams, use to feed, respire, reproduce and expel waste into … WebJan 9, 2024 · A bivalve's shell is formed of calcium carbonate that is secreted from the bivalve's mantle, which is the soft wall of the animal's body. The shell grows as the organism inside gets bigger. Not all …
WebApr 28, 2024 · Bilateral Symmetry Definition. Bilateral symmetry refers to organisms with body shapes that are mirror images along a midline called the sagittal plane. The internal organs, however, are not necessarily …
Webbi•valve. n. 1. any mollusk, as the oyster or mussel, of the class Bivalvia, having hinged lateral shells, a soft body enclosed by a mantle, sheetlike gills, and often a retractile foot. … theorising and updating aptitudeWebOct 13, 2024 · late 14c., "one of the halves of a folding door," from Latin valva (plural valvae) "section of a folding or revolving door," literally "that which turns," related to volvere "to roll," from PIE root *wel- (3) "to turn, revolve." Sense extended 1610s to "membranous fold regulating flow of bodily fluids;" 1650s to "mechanical device that works ... the orisha who opens doorsWebBivalve 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 roughfile clam from the Flower Garden Bank National … the orisha oshunWeba tube that is extended when a bivalve is underwater. used to eat, get oxygen and excrete waste (two kinds: incurrent, excurrent) Mantle thin membrane inside a bivalve that … the orisha tarotWebAnatomy of a bivalve. Inside the shell. Bivalve molluscs come in many shapes and sizes, and live in many different ways. However, there are features shared by all bivalves. … theoris inc indianapolisWebAug 28, 2024 · The Down and Dirty on a Most Unusual Bivalve. Janet Voight, Associate Curator of Invertebrate Zoology, Negaunee Integrative Research Center. This is the first … theoris indianapolisWebPhylum Mollusca is characterised by the pronounced development of musculature known as the foot. It is the locomotory organ in Molluscs. This organ is quite uncommon and strange to others. It is regarded as the remnant of the ‘dermo-muscular tube’ of the ancestral form whose ventral side became greatly developed as an adaptation for creep ... theorising algorithmic justice