Synovial fluid is present in:

A. Spinal cavity

B. Cranial cavity

C. Freely movable joint

D. Fixed joint

Freely movable joints are joints that allow movement in one or more directions. A synovial joint is a prime example of such a joint. In these joints, the bones are enclosed within a synovial membrane, forming a synovial cavity. This cavity is filled with synovial fluid, which serves several crucial functions:

• Acts as a lubricant, reducing friction between bones.
• Provides nutrients to the bones.
• Allows movement in multiple directions.
• Works as a shock absorber during falls or sudden jerks.

The main types of synovial joints are:

• Ball and Socket Joint
• Hinge Joint
• Gliding Joint
• Pivot Joint
• Saddle Joint

Conclusion: Synovial fluid is present in freely movable joints, making smooth and flexible movement possible.