ANATOMY
CHEST AND CARDIOVASCULAR
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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endocardium
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epicardiium
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myocardium
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pericardium
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Detailed explanation-1: -The pericardial sac positions the heart in the mediastinum and limits its motion while providing a lubricated slippery surface for the heart to beat inside and the lungs to move outside.
Detailed explanation-2: -The outer layer, or parietal (fibrous) pericardium, serves to anchor the heart within the thorax, and becomes contiguous with the adventitia of the great vessels.
Detailed explanation-3: -The fibrous pericardium and serous pericardium are innervated by the phrenic nerve, which is derived primarily from cervical nerve 4 but also has contributions from the 3 and 5. Due to its origin, pericarditis and other cardiac complications can cause referred pain to the shoulder.
Detailed explanation-4: -The pericardium is a membrane, or sac, that surrounds your heart. It holds the heart in place and helps it work properly.