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Title: The layer of the heart that does the work of contracting is the endocardium. Post by: lizsmith on Apr 13, 2019 The layer of the heart that does the work of contracting is the endocardium.
▶ true ▶ false Title: The layer of the heart that does the work of contracting is the endocardium. Post by: shawntage on Apr 13, 2019 Content hidden
Title: The layer of the heart that does the work of contracting is the endocardium. Post by: lizsmith on Apr 13, 2019 Thanks
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