Question

Which of the following describes a closed circulatory system?
a. nutrients diffuse from gastrovascular cavity into the tissues and waste diffuses in the opposite direction.
b. nutrients and waste diffusion in and from the pseudocoelom
c. hemolymph moves from the heart into the tissues and cavities and then drains back into the main cavity
d. blood moves from the heart into arteries and into smaller vessels and then back into larger vessels as it makes its way back to the heart.

Answer 1

Answer:

d. blood moves from the heart into arteries and into smaller vessels and then back into larger vessels as it makes its way back to the heart.

Explanation:

A closed circulatory system is a system in which blood is separated from the interstitial fluid as it circulates in the blood vessels. In a closed circulatory system blood circulates in one direction that is from the heart and then then returns to the heart again after circulating around one of two routes of circulation. A closed circulatory system can be observed in vertebrates, annelids, mollusks.