Exam (elaborations)
NP235 Cardiovascular System Unit 4 2022 Graded A+
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Cardiac Anatomy The heart wall consists of three layers. The epicardium is the outer layer of tissue; the myocardium is the middle layer of muscle fibers that contract to pump blood, and the endocardium is the lining of the inner surface of the heart chambers. A membranous sac, the per...
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