Final answer:
Osteoarthritis (OA) is a joint disease characterized by joint pain, stiffness, swelling, and decreased range of motion. Its causes involve mechanical stress, insufficient cartilage repair, and joint inflammation.
Explanation:
Osteoarthritis (OA) is a joint disease resulting from the breakdown of joint cartilage and bone. Symptoms include joint pain, stiffness, swelling, and decreased range of motion. The causes of OA are thought to be mechanical stress on joints, inadequate cartilage repair, and low-grade joint inflammation.
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