Heart Structures

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Check your knowledge of heart structures and how blood flows through this organ.

Superior Vena Cava

Blood, low in oxygen, from the upper portion of the body returns to the heart through this vein.

Inferior Vena Cava

Blood, low in oxygen, from the lower portions of the body returns to the heart through this vein.

Right Atrium

Chamber of the heart that takes in blood low in oxygen. Blood is coming from the body.

Tricuspid Valve

Valve that separates the right atrium and right ventricle

Right Ventricle

This chamber of the heart will pump blood out of the heart through the pulmonary artery.

Pulmonary Artery

Takes blood low in oxygen from the heart to the lungs.


Re-oxygenates blood!

Pulmonary Vein

Blood is carried in this vessel from the lungs to the heart. The blood is rich in oxygen.

Left Atrium

Chamber of the heart where blood high in oxygen enters.

Mitral (bi-cuspid) Valve

Valve that separates the left atrium and left ventricle.

Left Ventricle

Chamber of the heart that pumps blood into the aorta.


Blood vessel that carries oxygen rich blood to the body.

Coronary Arteries

Blood vessels that surround the outside of the heart and supply the heart tissue with oxygen and nutrients.


Thin membrane that covers and protects the heart.


Wall that divides the two sides of the heart.

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