204 CIRCULATORY SYSTEM. 



as stated, sometimes comes from the occipital. The stylo-mas- 

 toid passes along the aqueduct of Fallopius, detaching its arte- 

 rioles to the tympanum and to the labyrinth. 



The External Carotid having given off these trunks, pene- 

 trates vertically through the inner margin of the parotid gland, 

 and gives to it several small twigs. When it arrives on a line 

 with the neck of the lower jaw, it divides into two large trunks; 

 one of them, the Internal*Maxillary, goes to the parts within 

 the ramus of the lower jaw; the other, being smaller, is the 

 Temporal Artery. 



The Temporal Artery (Arteria Temporalis) continues to as- 

 cend through the substance of the parotid, but becomes super- 

 ficial in front of the meatus externus, in mounting over the root 

 of the zygoma; it is then distributed to the integuments on the 

 side of the head. 



It frequently sends off one or two ramifications, of but little 

 volume, to the masseter muscle. Just above its root, and while 

 surrounded by the parotid, a branch of some importance, the 

 Transverse Facial, (Transversalis Fadei,) leaves it, ancf crosses, 

 horizontally, the masseter muscle, just below the parotid duct, 

 sometimes above it. This branch is distributed to the adjacent 

 integuments and muscles, and terminates in front by anasto- 

 mosing with the facial and the infra-orbitar artery. 



A little below the zygoma, the Middle Temporal artery (Art. 

 Temp. Media) comes off from the Temporal, and, ascending 

 with the parent trunk, perforates the temporal fascia at the 

 upper margin of the zygoma, and is distributed to the temporal 

 muscle by many ramifications, which anastomose with the 

 deep-seated temporal arteries. After this, some small twigs, 

 called Auricular, go to the external ear from the trunk of the 

 temporal artery. 



The temporal artery, having ascended for an inch or so be- 

 tween the aponeurosis of the temporal muscle and the skin, it di- 

 vides into an Anterior and a Posterior Branch. The former as- 

 cends towards the side of the os frontis, and is distributed in 

 ramuscles to the orbicularis palpebrarum, the belly of the occi- 

 pito-frantalis, and the integuments of the front of the cranium, 

 anastomosing with the frontal artery and the temporal of the 

 other side. The posterior branch is distributed on the integu- 



