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CDC 1-2
3 Layers that make the structure of the heart
Question | Answer |
---|---|
The outer layer is the ______, a thin sac covering the heart muscle. | pericardium |
The second layer is the ______, which is the thick, muscular portion of the heart. | myocardium |
The _____ is the thin membrane that lines the inner surface of the heart muscle. | endocardium |