Osteoarthritis is the repeated use of a joint which gradually wears down
the articular cartilage.
What is a Cartilage?
These are soft connective tissues which are found between bones which
helps to ensure flexibility and reduce friction.
In most old people, these cartilages being to wear out thereby increasing
the friction between the bone joints. This leads to osteoarthritis which is
characterized by joint pain.
Read more about Osteoarthritis here https://brainly.com/question/10697062
