Clam - Wikipedia
Clam
Wikipedia.org
Anatomy
A clam's shell consists of two (usually equal) valves, which are connected by a hinge joint and a ligament which can be external or internal, much like a Venus Flytrap, which is the clams terrestrial equivalent.
In most clams, two adductor muscles contract to close the shells. The clam has no head, and usually has no eyes, (scallops are a notable exception), but a clam does have kidneys, a heart, a mouth, and an anus. For more information see bivalve and pseudofeces.
Clams, like most mollusks, also have open circulatory systems, which means that their organs are surrounded by watery blood that contains nutrients and oxygen.
Clams eat plankton by filter feeding, and they themselves are eaten by small sharks and squid.
Please visit the website to learn more; click on a photo to enlarge.
Votes:6
Comments: 0