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.
Pain due to osteoarthritis may come and go; you may feel better for a few weeks or months, and then the pain comes back worse than before. Why it happens: The cartilage between the vertebrae wears down, causing the bones to rub against each other. With less cushioning between the vertebrae, the joints become inflamed.