Examlex
________, the units of hereditary information, are short segments of deoxyribonucleic acid (DNA) . They help cells to reproduce themselves and to assemble proteins.
Cardiac Conduction System
The network of nodes, cells, and signals that control the heart's rate and rhythm through electrical impulses.
Right Atrium
The right upper chamber of the heart that receives deoxygenated blood from the body and pumps it to the right ventricle.
SA Node
The sinoatrial node, acting as the natural pacemaker of the heart by initiating electrical impulses.
AV Node
The atrioventricular node, which is a part of the electrical conduction system of the heart that delays the transmission of electrical impulses to the ventricles.
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