Blood flows from which part of the heart to the lungs?

Blood flows to the lungs from the right ventricle of the heart. The right ventricle is responsible for pumping deoxygenated blood into the pulmonary arteries, which then carry this blood to the lungs for oxygenation. In the lungs, carbon dioxide is exchanged for oxygen, rejuvenating the blood before it returns to the heart.

The right atrium receives deoxygenated blood from the body and channels it into the right ventricle. The left atrium and left ventricle deal with oxygenated blood; the left atrium receives blood that has already been oxygenated in the lungs and passes it to the left ventricle, which then pumps it to the rest of the body. Thus, the right ventricle is specifically tasked with the initial stage of sending blood to the lungs.