SPRINGER MEDIZIN / SCIENCE PHOTO LIBRARY SPRINGER MEDIZIN / SCIENCE PHOTO LIBRARY
Thigh muscles. Computer artwork of the pelvis showing the muscles of the front of the thigh. The muscle attached to the crest of the large ear-shaped hip bone is the sartorius, the longest muscle in the body. Beneath the sartorius are the quadriceps muscles. These muscles act to extend the knee and flex the hip.
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