THE MUSCLES. 79 



Inserted into the upper and inner part of the tibia. Use To bend 

 the leg inwards. 



Gracilis arises from the fore part of the ischium and pubis. In- 

 serted into the upper and inner part of the tibia. Use To bend 

 the leg. 



Reclus femoris arises from the lower spinous process of the ilium, 

 and edge of the acetabulum. Inserted into the upper and fore part 

 of the patella. Use To extend the leg, 



Vastus externus arises from the root of the great trochanter, and 

 linea aspera. Inserted into the upper and lateral part of the pa- 

 tella. UseTo extend the leg. 



Vastus internus arises from the trochanter minor, and the linea 

 aspera. Inserted into the upper and inner part of the patella. Use 

 To extend the leg. 



Cruralis arises from the anterior part of the lesser trochanter. 

 Inserted into the upper part of the patella. Use To extend the 

 leg. 



Semi-tendinosus arises from the tuberosity of the ischium. In- 

 serted into the upper and inner part of the tibia. Use To bend 

 and draw the leg inwards. 



Semi-membranosus arising from the tuberosity of the ischium. 

 Inserted into the back part of the head of the tibia. Use To bend 

 the leg. 



Biceps flexor cruris arises from the tuberosity of the ischium. 

 Inserted into the upper and back part of the tibia, forming the outer 

 hamstring. Use To bend the leg. 



Popliteus arises from the external condyle of the thigh-bone. 

 Inserted into the upper and inner part of the tibia. Use To assist 

 in bending the leg. 



MUSCLES SITUATED ON THE LEG. 



Gastrocnemius externus arises from the internal and external 

 condyle of the femur. Inserted into the os calcis, with the tendon 

 of the soleus. Use To extend the foot. 



Gastrocnemius internus arises from the head of the fibula, and 

 back part of the head of the tibia. Inserted into the os calcis by a 

 common tendon, which is called tendo-Achillis. Use To ex- 

 tend the foot. 



Plantaris arises from the outer condyle of the os femoris and 

 capsular ligament. Inserted into the os calcis, near the tendo- 

 Achillis. Use To assist in extending the foot. 



