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- The heart pumps
- blood through the two
- major, independent
- portions of the
- circulatory system,
- the pulmonary
- circulation and the
- systemic circulation.
- Consequently, the heart has
- four chambers: the two atria
- which collect the blood from
- the two portions of the
- circulatory system and the
- two ventricles which take
- the blood from the atria
- and pump it back out into
- the body. The right
- atrium or auricle collects
- the deoxygenated blood from
- the systemic circulation.
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