SPRINGER MEDIZIN / SCIENCE PHOTO LIBRARY SPRINGER MEDIZIN / SCIENCE PHOTO LIBRARY
Thigh hamstring muscles. Computer artwork of a posterior view of two of the three hamstring muscles (red) of the thighs. The muscles are the semimembranosus (inner) and semitendinosus (outer) muscles. They attach to the bones of the pelvis (top) and the tibia of the lower leg (bottom), forming part of the posterior compartment of the thigh. These muscles are used to flex the knee and straighten the hip. On the right leg, the semitendinosus muscle is see-through, revealing the semimembranosus muscle behind it. The third hamstring muscle, the biceps femoris, is not shown.
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