When we say an animal has an "open circulatory system," this means that:
A) a small amount of blood may leak out of vessels.
B) blood flows out of vessels and into spaces or sinuses.
C) the animal has a single-chambered heart, so blood mixes from all areas.
D) there are no vessels-blood simply fills all spaces inside the coelom.
E) movement of the animal is solely responsible for moving circulatory fluid.
Correct Answer:
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