How does the circulatory system play a direct role in reproduction?

Question

ANSWER CHOICES:

a. The brain stem controls the heart rate

b. Blood carries nutrients to body cells

c. Stomach muscles contract and expand

d. Blood transports hormones involved in reproduction

Answer 1

D. Blood transports hormones involved in reproduction

Answer 2

a. Describes an effect the nervous system has on the circulatory system.

b. Describes the purpose of the circulatory system as a whole.

c. Focuses solely on the muscular and digestive systems.

d. Describes the effect the circulatory system has on the reproductive system.

D is the correct answer. The other three answers do not address the reproductive system. In most bodily systems, hormones tend to act as messenger molecules, and rely on the circulatory system for transportation from one part of the body to the rest.