230 ANATOMY OF THE DOMESTIC FOWL 



No. i) through a foramen forraed by the os iHum and the os ischium. 

 It sends branches into the adductor muscles of the upper and the 

 lower thigh. It gives off anastomotic branches which unite with 

 those from the femoral artery. At the flexure of the knee-joint it 

 gives off two branches to that region (Fig. 69, No. 10). It gives off 

 another branch to the gastrocnemius muscle and one to the flexor 

 perforans digitorum. It terminates in the anterior and posterior 

 tibial arteries. 



The first, the tibialis postica (Fig. 69, No. 12) passes 

 between the gastrocnemius and the deep flexors giving off branches 



Fig. 68. — Blood-vessels and nerves o£ the fore limb. Inside view, i, Vena 

 humeri profunda.. 2, Brachialis longus inferior. 3, Brachialis profunda. 4, 

 Radial artery. 6. Ulnar artery. 7, Ulnar arterial branch to thumb. 8, Digital 

 , branch of ulnar artery. 9, Ulnar artery. 



in its course to the skin and to other parts, and disappears shortly 

 below the intertarsal joint. 



The second, the tibialis antica (Fig. 66, No. i; Fig. 69, No. 1,1), 

 is often the larger of the two arteries. The anterior tibial artery 

 gives off branches to the knee-joint and to adjacent structures. It 

 gives a large branch to the head of the gastrocnemius muscle. It 

 passes to the posterior surface of the tibial head and gives off the 

 peroneal artery, which passes through the membrana interossea 

 located between the tibia and fibula giving branches to the anterior 

 side of the membrane of the patellar region of the knee-joint. It 

 gives branches to the anterior side of the lower thigh and finally 

 terminates subcutaneously in the anterior tibial plexus. 



The main portion of the anterior tibial artery passes downward 



