WebFreshwater mussels are bivalved mollusks (Phylum Mollusca, Class Bivalvia) distantly related to ocean-dwelling clams, oysters, mussels, and scallops. Mussels evolved from a marine bivalve ancestor during the Paleozoic era, more than 245 million years ago. Fossil shells indicate that mussels coexisted with dinosaurs during the Mesozoic era (Age ... WebIt was uniformly segmented, with short, stiff appendages and soft, flexible skin. It had a complete digestive system and a closed circulatory system but no skeleton. Based on the descripti; All vertebrates have _____. a. an open circulatory system b. a closed circulatory system c. a four-chamber heart d. hemolymph
chapter 11 - molluscs (practical one) Flashcards Quizlet
WebThe soft body inside of the shell includes a muscular foot, gills (or ctenidia, used for respiration and feeding), muscles, a digestive system, nerves, a three-chambered heart … great hr expertise
Mollusca QUIZ Biology Quiz - Quizizz
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 … WebMay 23, 2024 · Bivalves 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 history their shells have been used for many purposes. Most buttons were made from shells before the advent of plastic. 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 back region of the shell is the hinge point or line, which contain the umbo and beak and the lower, curved margin is the … 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 millimetres (60.3 in) in Kuphus polythalamia, … 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. More recently, the class was known as Pelecypoda, meaning "axe-foot" (based on the … 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 Cambrian explosion took place around 540 to 520 million years ago (Mya). In this geologically brief period, all the major animal 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 sediment on the seabed, or in the sediment in … See more floating hand grip gopro