Grossly, the kidneys are bean-shaped structures and weigh about 150 g in the male and about 135 g in the female. They are typically 10-12 cm in length, 5-7 cm in width, and 2-3 cm in thickness. The images below further depict kidney anatomy and positioning Renal anatomy, renal fascia.
Osteoarthritis occurs when the cartilage of a joint erodes (breaks down). Bones begin to rub against each other, causing pain and difficulty moving the joint. Osteoarthritis also can affect nearby bones, which can become enlarged in places. These enlargements are called bone spurs or osteophytes.
In OA, this cartilage breaks down.OA usually occurs in the fingers and weight-bearing joints; these include, knees, feet, hips and back. Osteoarthritis is the result of changes in the cells of the cartilage resulting in a loss of elasticity. Over time this causes the cartilage to thin out and in some situation breakdown all together. This leaves the ends of the bone without its smooth covering, and the joint loses its easy mobility..