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circulation

The movement of blood through the heart and blood vessels around the body.

ser-kyuh-LAY-shun noun

What it means

The heart pumps blood through two loops. In pulmonary circulation, the right side of the heart sends blood to the lungs to pick up oxygen; in systemic circulation, the left side pumps oxygen-rich blood to the rest of the body and veins bring it back. In first aid and the ABCs, "C" stands for circulation.

For the nurse

Check circulation in a limb by color, warmth, capillary refill and pulses, especially after a cast, surgery or a procedure through an artery.

At a glance

Spanishcirculación
Also writtencirculate, circulating

Related terms

perfusion

The flow of blood through the body's tissues, bringing them oxygen and nutrients.

vein

A blood vessel that carries blood back toward the heart.

artery

A blood vessel that takes blood from the heart out to the body.

pulse

The throb of an artery felt with each heartbeat, used to count the heart rate and judge blood flow.

circulatory

Relating to the movement of blood through the heart and blood vessels.

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