Examlex
Describe the peripheral nervous system.
Right Atrium
The right atrium is one of the four chambers of the heart, receiving deoxygenated blood from the body and pumping it into the right ventricle.
Blood Pressure
The pressure exerted by circulating blood upon the walls of blood vessels, often measured for health assessment.
Ventricles Contract
The phase of the cardiac cycle in which the ventricles of the heart contract, pumping blood to the body and lungs.
SA Node
The SA Node, or sinoatrial node, acts as the heart's natural pacemaker, generating electrical impulses that initiate the heartbeat.
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