Plates include both oceanic crust and continental crust. Stable subduction zones involve the oceanic lithosphere of one plate sliding beneath the continental or oceanic lithosphere of another plate due to the higher density of the oceanic lithosphere. That is, the subducted lithosphere is always oceanic while the overriding lithosphere may or may not be oceanic.
The exact cause of arthritis is unknown. However, there are a number of risk factors associated with various arthritic conditions. A risk factor increases the chances that a person will develop a disease or condition.Risk factors for osteoarthritis (OA) include heredity and the wear and tear of aging.he exact cause of arthritis is unknown. However, there are a number of risk factors associated with various arthritic conditions. A risk factor increases the chances that a person will develop a disease or condition.
Arthritis means joint inflammation. The joint inflammation of rheumatoid arthritis causes swelling, pain, stiffness, and redness in the joints. The inflammation of rheumatoid disease can also occur in tissues around the joints, such as the tendons, ligaments, and muscles.In some people with rheumatoid arthritis, chronic inflammation leads to the destruction of the cartilage, bone, and ligaments, causing deformity of the joints.heumatoid arthritis (RA or atrophic arthritis) facts. 1  Rheumatoid arthritis is an autoimmune disease that can cause chronic inflammation of the joints and other areas of the body. 2  Rheumatoid arthritis symptoms and signs include. 3  joint pain in the feet, hands, and knees, 4  swollen joints, 5  fever, 6  tender joints,