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Heart Anatomy

heart anatomy

Illustration from the National Institutes of Health: National Heart, Lung, and Blood Institute.

Circulatory System Vocabulary

circulatory system : organ system responsible for the circulation of blood throughout the body (also called the cardiovascular system)

aorta : main artery of the body

artery : a blood vessel that carries blood from the heart to the body

atrium : one of the two, thin-walled upper chambers of the heart (plural: atria)

blood : the red liquid that flows through the bodies of people and animals to deliver oxygen to organs

capillary : smallest blood vessel found between arteries and veins

heart : the organ in the chest that pumps blood through the veins and arteries

hemoglobin : a red protein in blood that transports oxygen

plasma : the watery fluid part of the blood; makes up about 55% of the blood

platelets : cell fragments in the blood which help with clotting

red blood cell : carries the oxygen throughout the circulatory system

valve : a structure in the heart and some veins that prevents the blood from flowing backwards

vein : a blood vessel that carries blood toward the heart ventricle : a chamber of the heart that receives blood from an atrium

ventricle : one of the two thick-walled lower chambers of the heart; the pumped part of the heart

white blood cell : blood cells that engulf and digest bacteria and fungi

Adapted from Human Body Systems by the National Science Resources Center, Systems of the Human Body by Tina S.Circulatory System Vocabulary Quizlet by SPinnacle, and

Circulatory System Books

Heart 101 | National Geographic

How the heart actually pumps blood - Edmond Hui

The Heart and Circulatory System - How They Work

Chambers of the Heart