Question

what function do capillaries serve in the cardiovascular system?
a. carry blood to the brain
b. return blood to the lungs
c. help control body temperature
d. replace old blood cells
please select the best answer from the choices provided.
o a
o b
o c
o d

Explanation:

• Option A: Arteries (like carotid arteries) carry blood to the brain, not capillaries' main function here.
• Option B: Veins (like pulmonary veins) return blood to the lungs, not capillaries.
• Option C: Capillaries are involved in heat exchange (e.g., vasodilation/constriction in skin capillaries to release/ retain heat), helping control body temperature.
• Option D: Replacing old blood cells is done by bone marrow, not capillaries.

Answer:

C. help control body temperature