What surrounds the heart and has a parietal layer and a visceral layer?

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Multiple Choice

What surrounds the heart and has a parietal layer and a visceral layer?

Explanation:
The heart is enclosed by the pericardium, a double-layered serous membrane that forms a surrounding sac. The parietal layer lines the inside of the fibrous pericardium, while the visceral layer (the epicardium) covers the surface of the heart. Between these two layers is the pericardial cavity, containing a small amount of fluid to reduce friction as the heart beats. The other options belong to different body cavities—parietal pleura and visceral pleura surround the lungs, pia mater surrounds the brain and spinal cord, and the peritoneum lines the abdominal cavity.

The heart is enclosed by the pericardium, a double-layered serous membrane that forms a surrounding sac. The parietal layer lines the inside of the fibrous pericardium, while the visceral layer (the epicardium) covers the surface of the heart. Between these two layers is the pericardial cavity, containing a small amount of fluid to reduce friction as the heart beats. The other options belong to different body cavities—parietal pleura and visceral pleura surround the lungs, pia mater surrounds the brain and spinal cord, and the peritoneum lines the abdominal cavity.

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