WebBivalves are laterally compressed, with the two shells hinged at the _______________ margin. dorsal In most gastropods there is an area called the osphradium located at the … WebBivalves have an open circulatory system that bathes the organs in hemolymph. The heart has three chambers, two auricles receiving blood from the gills, and a single ventricle. The ventricle (heart) is muscular and pumps hemolymph into …
Phylum Mollusca
WebIn bivalves, the serotonergic system modulates reproduction through gametogenesis, spawning induction, and sperm motility (Alavi et al., 2024a (Alavi et al., , 2024b Canesi et al., 2024). However ... WebBivalves have an open circulatory system. A number of bivalve species have some commercial value, including representatives of all the groups discussed here. Bivalves are valued as food sources, and throughout … bioactive advance
Mollusca, bivalvia modified geology - SlideShare
WebThe 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 … Bivalves have an open circulatory system that bathes the organs in blood . The heart has three chambers: two auricles receiving blood from the gills, and a single ventricle . The ventricle is muscular and pumps hemolymph into the aorta , and then to the rest of the body. See more 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. As a … See more Bivalves have bilaterally symmetrical and laterally flattened bodies, with a blade-shaped foot, vestigial head and no radula. At the dorsal or … See more The Cambrian explosion took place around 540 to 520 million years ago (Mya). In this geologically brief period, all the major animal phyla diverged and these included the first creatures with mineralized skeletons. Brachiopods and bivalves made their appearance at … See more The taxonomic term Bivalvia was first used by Linnaeus in the 10th edition of his Systema Naturae in 1758 to refer to animals having shells composed of two valves. … See more Brachiopods are shelled marine organisms that superficially resembled bivalves in that they are of similar size and have a hinged shell in two … See more The adult maximum size of living species of bivalve ranges from 0.52 mm (0.02 in) in Condylonucula maya, a nut clam, to a length of 1,532 … See more The bivalves are a highly successful class of invertebrates found in aquatic habitats throughout the world. Most are infaunal and live buried in … See more Webbivalve, (class Bivalvia), any of more than 15,000 species of clams, oysters, mussels, scallops, and other members of the phylum Mollusca characterized by a shell that is … bioactive amines