The superior aspect of the buttock ends at the iliac crest, and the lower aspect is outlined by the horizontal gluteal crease. The buttocks are formed by the masses of the gluteal muscles or "glutes" (the gluteus maximus muscle and the gluteus medius muscle) superimposed by a layer of fat. Many cultures have also used the buttocks as a primary target for corporal punishment, as the buttocks' layer of subcutaneous fat offers protection against injury while still allowing for the infliction of pain. In many cultures, the buttocks play a role in sexual attraction. They are responsible for movements such as straightening the body into the upright (standing) posture when it is bent at the waist maintaining the body in the upright posture by keeping the hip joints extended and propelling the body forward via further leg (hip) extension when walking or running. The two gluteus maximus muscles are the largest muscles in the human body.
BUBBLE BOY MEANING SKIN
They are composed of a layer of exterior skin and underlying subcutaneous fat superimposed on a left and right gluteus maximus and gluteus medius muscles. In humans, the buttocks are located between the lower back and the perineum. The buttocks ( SG: buttock) are two rounded portions of the exterior anatomy of most mammals, located on the posterior of the pelvic region.
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