Examlex
Worksheet headings are the column letters and row numbers._________________________
Pericardium
The protective sac of tissue surrounding the heart, helping to support and protect it while allowing it to function efficiently.
Myocardium
The muscular tissue of the heart wall, responsible for the contractile force to pump blood.
Epicardium
The outermost layer of the heart wall, serving as a protective layer and a part of the heart's structure.
Heartbeat
The rhythmic contraction and relaxation of the heart muscles, pumping blood throughout the body.
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