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Biology
Minnie
6 September, 21:29
Explain the structure of heart
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Darion Murphy
7 September, 00:03
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Answer: The human heart is a four-chambered muscular organ, shaped and sized roughly like a man's closed fist with two-thirds of the mass to the left of mid-line. The heart is enclosed in a pericardial sac that is lined with the parietal layers of a serous membrane.
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