Answer :
The cardiovascular system performs four main functions: first, contractions of the heart generate blood pressure, contractions blood vessels moves blood through the blood vessels.
Your body's main pump for moving blood is the heart, a hand-sized organ. Your circulatory system's main organ, so to speak. Powered by electrical impulses, your heart is divided into four major chambers that are formed of muscle. The activity of your heart is controlled by your neurological system and brain. There are liquid and solid components to blood. Water, salts, and protein make up the liquid component, known as plasma. Plasma makes up the majority of your blood. Red, white, and platelet cells make up the portion of your blood that is solid. Your organs and tissues receive oxygen from your lungs thanks to red blood cells (RBC).
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