28+ Clam Mollusk Anatomy. Mollusks have many features in common with annelids and arthropods, such as bilateral symmetry, triploblasty, ventral nerve cords, and a coelom. Clam, in general, any member of the invertebrate class bivalvia—mollusks with a bivalved shell (i.e., one with two separate sections).
Illustration of the internal structure of a clam.
Mollusks are divided into seven classes with most species residing in gastropoda, bivalvia or cephalopoda. This page is about mollusk anatomy diagrams,contains the tide chaser: Although the original ancestor of the mollusks is lost in the dawn. Clam, in general, any member of the invertebrate class bivalvia—mollusks with a bivalved shell (i.e., one with two separate sections).