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

1.	How do our bone joints function without grinding noise and pain?
Answer» \xa0The presence of synovial fluid, between articulating surface of the two bones enclosed within synovial cavity of synovial joints to makes our joints to function without grinding noise and pain.\xa0The bone joints function without grinding noise and pain because the end of the bones are covered by the articular cartilage which allows easy movement of the bones against each other.

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