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1. During a heart attack, some of the cells in the thick layer of muscle in the heart walls die. This layer of muscle is called the (1 point) • Do not choose. • pericardium. • connective tissue layer. • myocardium.

User Martheli
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2 Answers

5 votes
myocardium is the answer
User Spioter
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Myocardium, that's because myocardium simply means 'muscular tissue of the heart'. It is not pericardium or connective tissue as these are only small, specific areas of the heart and a heart attack can cause cells to die anywhere in the heart.
User Mestica
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