The Circulatory System of Most Molluscs Is

Question

The circulatory system of most molluscs is
A)hydraulic.
B)incurrent.
C)closed.
D)excurrent.
E)open.

Accepted Answer

The circulatory system of most molluscs is open, meaning that the blood is not enclosed within vessels and flows freely in the body cavity. This is in contrast to closed circulatory systems where blood is enclosed within vessels.