Circulation
The right side pumps to the lungs. The left side pumps to the body.
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AAnatomy & Physiology | Heart Ready
Heart anatomy lecture
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STUDY SUMMARY
Sample contentHow blood moves through the heart
The heart functions as a double pump, moving blood through pulmonary circulation for oxygen exchange and systemic circulation to supply the body.
- Four chambers separate oxygenated and deoxygenated blood.
- Heart valves prevent backflow during each contraction.
- The SA and AV nodes coordinate the heartbeat.
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Why is the left ventricle wall thicker?
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LECTURE SUMMARY4 min review
Heart anatomy and circulation at a glance
This lesson covers the anatomy and physiology of the heart, including blood flow through its four chambers, the role of the valves, and the electrical conduction system. It also connects pulmonary circulation, systemic circulation, and the coronary blood supply.
Deoxygenated blood
Blood enters the right atrium, moves to the right ventricle, and travels to the lungs through the pulmonary arteries.
Oxygenated blood
Pulmonary veins return blood to the left atrium before the left ventricle sends it through the aorta.
Valves
The tricuspid, pulmonary, mitral, and aortic valves keep blood moving in one direction.
Electrical conduction
The SA node starts the signal, and the AV node helps coordinate ventricular contraction.
Exam takeaway: Be able to trace one red blood cell through every chamber, valve, and major vessel in the correct order.
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