IV. Internal Muscles of the Thigh

The sartorius arises by two heads, one from the tendon of the psoas minor and the iliac fascia, the other from the shaft of the ilium. The femoral vessels pass between them.

The gracilis is more extensively united with its fellow than in the horse.

The pectineus is large, and arises by a single head from the pubic crest and prepubic tendon. It divides into two branches, one of which is inserted as in the horse, while the other extends to the internal epicondyle of the femur.

The adductor resembles that of the horse, but does not reach to the internal condyle.

The quadratus femoris and obturator externus resemble those of the horse.

The obturator internus arises from the ischium only, and its tendon passes through the obturator foramen.

The gemellus is large.