The Heart

The Heart, this A-Level Biology section of Revision Science includes a diagram of the human heart.

Deoxygenated blood

Enters through the vena cava into the right atrium
It’s then pumped through a valve into the right ventricle chamber
And then up through the pulmonary valve into the pulmonary artery towards the lungs

Oxygenated blood

Enters through the pulmonary veins into the left atrium
It’s then pumped through a valve into the left ventricle
And then through the aortic valve and out of the aorta to the rest of the body

This video explains how the heart works

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