Since the hemolymph of crustaceans leaves the heart by arteries,why is it considered an open rather than a closed system?
A)The hemolymph lacks any respiratory pigments.
B)The hemolymph flows through the hemocoel and returns via venous sinuses rather than enclosed veins.
C)The heart does not pump hemolymph but it moves by ciliary action instead.
D)The arteries "dead end" and the hemolymph must backflow through the arteries.
E)The hemolymph lacks any respiratory function.

Question

Quizplus · Accepted Answer

In an open circulatory system, the hemolymph flows through the body cavity or hemocoel, and there are no enclosed veins. In crustaceans, the heart pumps the hemolymph into arteries, but it then flows through the hemocoel and returns via venous sinuses rather than enclosed veins. Therefore, it is considered an open system. The other options are incorrect since they do not describe features specific to open circulatory systems.

Since the Hemolymph of Crustaceans Leaves the Heart by Arteries,why