Question

which components make up the cardiovascular system?
lungs, heart, and blood vessels
heart, blood vessels, and blood
heart, blood, and lungs
lungs, heart, and skin

Explanation:

The cardiovascular system is composed of the heart which pumps blood, blood vessels that carry blood, and blood itself which transports substances. Lungs are part of the respiratory system and skin is part of the integumentary system.

Answer:

B. heart, blood vessels, and blood