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erik [133]
4 years ago
5

Explain the structure of heart​

Biology
1 answer:
Cloud [144]4 years ago
7 0

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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