The heart is enclosed in a double membranous sac called:
Correct answer: C. Pericardium
- A. Thoracic cavity
- B. Chest cavity
- C. Pericardium
- D. Pleural cavity
Explanation
The heart of human is located in the chest cavity. The heart is enclosed in a double membranous sac the pericardial cavity, which contains pericardial fluid. Pericardium prevents the heart, prevents it from overextension and pericardial fluid protects it from abrasion.
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The circulatory system covers the chambers, valves and conducting pathway of the human heart, along with the cardiac cycle and control of heartbeat. It compares arteries, veins and capillaries by structure and function, and explains how the lymphatic system returns tissue fluid, transports absorbed fats and supports immunity.
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