Pump blood through the circulatory system.

It's divided into two ventricles and two atria.

Body's transportation system.

Arteries

Veins

Capillaries

When the coronary arteries obstruct, and heartmuscle dies.

The suden death of brain cells when their bloodsupply is interrupted.

When the blood pressure is 140/90 or higher.

Heart pumps oxygenpoor blood from the heartto the lungs.

Heart pumps oxygenrich blood to the rest of thebody.