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4 votes
The myocardium is the A. delicate lining of the atria. B. smooth lining of ventricles. C. inner lining of atria and ventricles. D. muscular wall making up the bulk of the heart.

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User Ron Dunn
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1 Answer

2 votes
The correct answer is C. The myocardium is a strong layer of muscle that protects the lining of the epicardium and the endocardium.
answered
User Anpatel
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