AP BIOLOGY

Detailed explanation-1: -Two pathways come from the heart: The pulmonary circulation is a short loop from the heart to the lungs and back again. The systemic circulation carries blood from the heart to all the other parts of the body and back again.

Detailed explanation-2: -Systemic circulation moves blood between the heart and the rest of the body. It sends oxygenated blood out to cells and returns deoxygenated blood to the heart.

Detailed explanation-3: -After oxygenation, the oxygenated blood returns to the left atrium of the heart through the pulmonary vein. The movement of blood between the heart and lungs is called the pulmonary circulation.

Detailed explanation-4: -systemic circulation, in physiology, the circuit of vessels supplying oxygenated blood to and returning deoxygenated blood from the tissues of the body, as distinguished from the pulmonary circulation.

Detailed explanation-5: -In the systemic circulation, the left ventricle pumps oxygen-rich blood into the main artery (aorta). The blood travels from the main artery to larger and smaller arteries and into the capillary network.