pericardial cavityAlso called the pericardial sac, the body cavity within which the heart lies. In vertebrates, it is a coelemic space, separated from the perivisceral part of the coelum (incompletely in elasmobranchs). In arthropods and molluscs, it is a hemocoelic space supplying blood to the heart. Related categories• HEART TOPICS• ANATOMY AND PHYSIOLOGY Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History |