Multiple choice

Which of the following functions is performed by the pericardial fluid?

  1. To reduce the friction between the heart wall and surrounding tissues

  2. To protect the heart from mechanical injury

  3. To allow the diffusion of oxygen into intracellular space

  4. To prevent the entry of deoxygenated blood in the pericardial cavity

  5. To provide the elasticity to the walls
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A Correct answer
Explanation

Pericardial fluid reduces friction between the heart wall and surrounding tissues when the heart beats.

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