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 primary causes of arthritis include viruses, bacterial infections, injuries, autoimmune disorders, and old age. There are over one hundred different types of arthritis, and each of these types can occur as a result of a different cause.Arthritis can affect large joints and small joints.The pain might remain located to one joint, or multiple areas of the body can develop symptoms.here are over one hundred different types of arthritis, and each of these types can occur as a result of a different cause. Arthritis can affect large joints and small joints. The pain might remain located to one joint, or multiple areas of the body can develop symptoms.
Also known as: RA. Rheumatoid arthritis (RA) is a chronic autoimmune disease that causes stiffness, pain, loss of mobility, inflammation, and erosion (deterioration) in the joints. It usually affects multiple joints symmetrically, the hand and wrists most commonly, but also elbows, neck, shoulders, hips, knees, and feet.