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Why do you think that thr …

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Why do you think that thr heart is enclosed with in a double-walled sac???
  • 1 answers

Gaurav Seth 5 years, 1 month ago

Pericardium

The heart is enclosed by a sac-like covering called as pericardium. It has 2 layers. The outer layer is more fibrous and is called as a parietal layer. 
The inner layer is smooth and is called as a visceral layer. Pericardium protects the heart from mechanical injury and helps in the movement of the heart walls.

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