Which of the following is characteristic of the circulatory system of arthropods?
A) lack of a heart
B) lack of blood
C) lack of blood vessels
D) lack of distinction between blood and interstitial fluid

Question

Quizplus · Accepted Answer

Arthropods have an open circulatory system where there is no distinction between blood and interstitial fluid. The fluid inside their body cavity, called hemolymph, bathes the organs directly, and the heart pumps the hemolymph through the body cavity. There are no blood vessels, and the circulation is not as efficient as it is in a closed circulatory system found in vertebrates.

Which of the Following Is Characteristic of the Circulatory System