How Is an Insect Circulatory System Best Described

How is an insect circulatory system best described?

A) The open system uses a dorsal aorta and accessory pulsatory organs to push hemolymph through the body cavities and wings,etc.but the hemolymph has little respiratory function.
B) The system is totally closed like ours with arteries and veins and the amebocytes aid in respiratory function.
C) The system is similar to ours with general closed sinuses but no distinct arteries and veins.
D) A circulatory system is totally absent and each body cell is on its own to gain food and get rid of wastes.
E) None of the choices is correct.

Correct Answer:

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