Question

When we say that "the cardiovascular system has 2 hearts," what do we mean by this?

1) The top half of the heart pumps blood to the top half of the body, while the bottom half of the heart pumps blood to the bottom half of the body
2) The left half of the heart pumps blood to the body tissues, while the right half of the heart pumps blood to the lungs
3) The left half of the heart sends blood to the left side of the body, while the right half of the heart sends blood to the right half of the body
4) The heart itself pumps blood like normal, while the valves in the legs veins act like a "second heart" to help boost the blood return back to the heart and lungs

Answer 1

The cardiovascular system has two hearts which refers to the two separate pumping actions of the heart. The right side pumps deoxygenated blood to the lungs, while the left side pumps oxygenated blood to the rest of the body.

Step-by-step explanation:

The statement that "the cardiovascular system has 2 hearts" refers to the fact that the heart acts as two separate pumps. The right side of the heart pumps deoxygenated blood to the lungs for oxygenation, while the left side pumps oxygenated blood to the rest of the body. This allows for the efficient circulation of oxygen and nutrients throughout the body.