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Question

Joints are lubricated by


  1. synovial fluid

  2. pleural fluid

  3. peritoneal fluid

  4. lymph


Solution

The correct option is A

synovial fluid


Synovial fluid is a viscous fluid found in the cavities of synovial joints. The principal role of synovial fluid is to reduce friction between the articular surfaces of synovial joints during movement.

Pleural fluid -  Pleural fluid is the fluid that is found between the layers of the pleura, the membranes that line the thoracic cavity and surround the lungs.
Lymph -  contains infection-fighting white blood cells, which circulates throughout the body.
Peritoneal Fluid - is a liquid made in the abdominal cavity which lubricates the surface of the tissue that lines the abdominal wall and pelvic cavity.

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