THE THIGH. 



5 21 



The semimembranosus arises from the tuberosity just above and external to the biceps 

 and semitendinosus. The biceps, arising by its long head from the tuberosity, lies first 

 to the inner side of the sciatic nerve, and then, as it crosses obliquely to reach the 



_;__ Tuberosity of 



' the ischium 



Adductor 

 tubercle 



FIG. 530. The flexor muscles of the thigh. 



FIG. 531. Adductor muscles of the thigh. 



outer side of the knee, covers the nerve and finally lies to its outer side. The upper 

 portion of the semimembranosus lies beneath both the long head of the biceps and 

 the semitendinosus, and only comes to the surface between them from the middle of 



