AP BIOLOGY

Detailed explanation-1: -systole-this is when your heart contracts, pushing blood out of the chambers.

Detailed explanation-2: -The heart is a pump, usually beating about 60 to 100 times per minute. With each heartbeat, the heart sends blood throughout our bodies, carrying oxygen to every cell. After delivering the oxygen, the blood returns to the heart. The heart then sends the blood to the lungs to pick up more oxygen.

Detailed explanation-3: -The human heart is a single organ, but it acts as a double pump. The first pump carries oxygen-poor blood to the lungs, where it unloads Carbon dioxide and picks up Oxygen. It then delivers Oxygen-rich blood back to the heart. The second pump delivers Oxygen-rich blood to every part of the body.

Detailed explanation-4: -The heart is an organ which beats continuously to act as a pump for the transport of blood, which carries other substances with it. The heart pumps the deoxygenated blood to the lungs for oxygenation and receives oxygenated blood from lungs. It pumps the oxygenated blood to different parts of the body.