Question

the cardiovascular system consists of the ____________. select all that apply.
a heart
b blood vessels
c blood
d lungs

Explanation:

The cardiovascular system is composed of the heart (which pumps blood), blood vessels (which transport blood), and blood (the fluid that circulates). Lungs are part of the respiratory system, not the cardiovascular system.

Answer:

A. heart, B. blood vessels, C. blood