Which layer of the heart wall contains cardiac muscle cells?

Which layer of the heart wall contains

Multiple choice — select the best answer

AMyocardium
BEpicardium
CEndocardium
DPericardium

✓ Correct answer: A. Myocardium The myocardium is the middle and thickest layer of the heart wall, consisting primarily of cardiac muscle cells that contract to pump blood through the circulatory system.

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Which layer of the heart wall contains cardiac muscle cells?

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