- deoxygenated blood returning from the body enters the heart through the superior vena cava and inferior vena cava.
- blood passes into the right atrium and right ventricle.
- right ventricle pushes the blood through the pulmonary arteries.
- blood passes through the lungs where it loses carbon dioxide and picks up oxygen.
- this oxygenated blood returns to the heart via the pulmonary veins.
- blood enters the left atrium and left ventricle.
- the left ventricle pushes the blood out through the main artery, the aorta.
- blood travels to all parts of the body where it delivers oxygen and picks up carbon dioxide.
Click to see this process in animation
