Question

How do our bone joints function without grinding noise and pain?​

Answer 1

Answer:

Our bone joints function without grinding noise and pain due to the presence of synovial fluid between bones.

Hope this will help you.

Answer 2

Answer:

The heads of bones in a movable joint have cartilaginous covering. Moreover, the joint is enclosed in a capsule which is filled with a lubricating fluid. This helps in movement of joints without grinding noise and pain.