Question

question 3
which organ is responsible for pumping blood around the body in the cardiovascular system?
heart
stomach
brain
arteries

Explanation:

The heart is the organ that pumps blood throughout the body in the cardiovascular system. The stomach is part of the digestive system, the brain is part of the nervous system, and arteries are blood vessels that carry blood away from the heart (not the pumping organ).

Answer:

heart