hemocoel A body cavity in arthropods and molluscs that is a blood-filled, expanded portion of the circulatory system. Unlike the coelom, which is small in arthropods and molluscs, the hemocoelum does not communicate with the exterior and never contains gametes (germ cells). Related category • ZOOLOGY Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) |