the function of the system
Muscles are the only tissue in the body that has the ability to contract and therefore move the other parts of the body.
2 major disorders
As we age, our joint tissues become less resilient to wear and tear and start to degenerate manifesting as swelling, pain, and oftentimes, loss of mobility of joints.
degeneration of joint cartilage and the underlying bone, most common from middle age onward. It causes pain and stiffness, especially in the hip, knee, and thumb joints.