The Following Statements Describe Features of Cardiovascular Systems

Short Answer

The following statements describe features of cardiovascular systems. Match the appropriate system from the list to each description. Some choices may be used more than once.
-this occurs at the body surface and lining of the gastrovascular cavity in cnidarians and flatworms
A)direct gas exchange
B)open circulatory system
C)two-chambered heart
D)three-chambered heart
E)four-chambered heart