Buttocks
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The buttocks are two parts of the body. They are on the back of the pelvic area and give padding when people sit.
Buttocks are formed mainly from two large muscles on each side. These are the gluteus maximus and the glutius medius. They go from the hip to the top of the leg, so they are not there just for decoration.
In some African populations the buttocks look bigger because of extra fat. This condition is known as steatopygia. It is an inherited condition first noticed in the Khoisan (San people) of southern Africa and the pygmies of central Africa. Now it has been recognized in the people of the Andamanese islands in the Pacific Ocean.