Earth and Environmental Sciences Invertebrate Paleontology Fall 1999 November 10.
Food is strained out on the gill surface.
Cilia on palps sweep food into the mouth. Non-burrowing bivalves are all filter feeders, but burrowers can be either filter or deposit feeders. Their 'arteries' lead from the heart to the foot. A valve in the vein is closed. The foot is thrust forward, the end of the foot swells and serves as an anchor.