http://bivalves.teacherfriendlyguide.org/index.php?option=com_content&view=article&id=19&Itemid=111 WebThe bivalve body comprises a dorsal visceral mass and a ventral foot, which is enclosed within a thin mantle, or pallium. The mantle secretes from its outer surface a shell divided into left and right valves. Between the body and mantle is the mantle cavity, within which hang the left and right gills, or ctenidia.
Bivalves Examples & Characteristics - Video & Lesson …
WebBivalve Anatomy The valve structure and soft anatomy of the bivalves varies among species. The Hard-Shelled Clam or Cherrystone, ... One of the main traits of all bivalves is the absence of a head and its associated organs such as eyes, head tentacles, and mouthparts. Scientists believe that early ancestors of bivalves had heads, like their ... Webbivalve: [adjective] being or having a shell composed of two valves. south shore eye wantagh
Biology of Bivalve Molluscs - Florida Shellfish Aquaculture Online ...
WebProtocardia is an extinct genus of saltwater clams, marine bivalve mollusks in the subfamily Protocardiinae of the family Cardiidae, the cockles. The internal anatomy of individuals in this genus is sometimes preserved in phosphate. References This page was last edited on 10 April 2024, at 16:20 ... WebAug 26, 2024 · Basic Biology and Anatomy of the Bivalvia. Bivalves have no head and no radula or odontophore. All bivalves possess a large muscular foot. Most bivalves have two tubes, or siphons, located toward the posterior end of the animal. These are called the incurrent siphon (which draws water into the mantle cavity) and the excurrent siphon … WebThe shell. The bivalve shell is made of calcium carbonate embedded in an organic matrix secreted by the mantle. The periostracum, the outermost organic layer, is secreted by the inner surface of the outer mantle fold at the mantle margin. It is a substrate upon which calcium carbonate can be deposited by the outer surface of the outer mantle fold. teak drip pan for bathtub