BRAINCAKEBlood Flow through the Heart
Mammals have a double circulation: blood passes through the heart twice in each complete circuit of the body. The right side of the heart pumps blood to the lungs (the pulmonary circulation), and the left side pumps blood to the rest of the body (the systemic circulation).
Right side (deoxygenated blood).
1. Deoxygenated blood from the body returns to the right atrium through the vena cava.
2. It passes through the tricuspid valve into the right ventricle.
3. The right ventricle pumps it through a semilunar valve into the pulmonary artery, which carries it to the lungs, where it picks up oxygen and loses carbon dioxide.
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More in The Heart
- Structure of the Human Heart
- Contraction of Cardiac Muscle
- The Cardiac Cycle
- Control of the Heartbeat
- Electrocardiograms
- Electrical and Pressure Changes in the Heart
All 7 lessons in The Heart · All Edexcel AS-level Biology topics