The circulation of the blood is caused mainly by
A) The pumping action of the heart
B) One-way valves in the arteries
C) The pumping action of skeletal muscles
D) Gravity
E) The elastic properties of arteries

Question

Quizplus · Accepted Answer

The primary force that drives the circulation of blood throughout the body is the pumping action of the heart. The heart contracts to push blood through the circulatory system, delivering oxygen and nutrients to tissues and organs.

The Circulation of the Blood Is Caused Mainly by