Question

In humans, the _______ fluid present in pericardium protects the heart from injuries.

• A. Pleural
• B. Mucosal
• C. Pericardial
• D. None of the above

Answer 1

The correct option is C Pericardial

A. The pleural cavity, with its associated pleurae, aids optimal functioning of the lungs during breathing.

B. Mucosal fluid functions is to keep the tissue moist (for example in the respiratory tract, including the mouth and nose).
C. Pericardial fluid is a serous fluid secreted by the serous layer of the pericardium into the pericardial cavity. It reduces friction within the pericardium by lubricating the epicardial surface allowing the membranes to glide over each other with each heart beat.

So, the correct answer is 'Pericardial'.