CIRCULATORY APPARATUS. 93 



5. Posterior temporal, to muscle. 



6. Deep anterior temporal, to temporal fossa. 



7. Ophthalmic, passes into orbit, then out of it by the orbital 

 foramen, and divides in the ethmoidal fossa. It gives off muscu- 

 lar and ciliary arteries to the eye, the central artery of the retina, 

 the supra-orbital to the forehead, the lachrymal to the upper lid 

 and gland, cerebral branches to the anterior lobes of the brain, 

 and terminates by the meningeal branch to the dura and a nasal 

 branch to the ethmoid and median septum. 



8. Buccal, to superficial and deep facial muscles. 



9. Staphylin, to soft palate, by posterior palatine groove. 



10. Superior dental, passes through superior dental canal to 

 infraorbital foramen, where it divides into one small branch to the 

 face, and another to the incisor, canine and anterior molar teeth. 



11. Nasal, to outer and inner walls of nasal cavity. 

 Palato-labial, passes along palatine groove to near central 



incisors, then up through the incisive foramen to the nose and 

 structures of the upper lip and gum. 



POSTERIOR AORTA. 



Passes upward and backward to the seventh dorsal vertebra, 

 forming its arch, thence to the space between the pillars of the 

 diaphragm, where it becomes the abdominal aorta. At the last 

 intervertebral articulation it ends in a double bifurcation, the two 

 internal and two external iliac arteries. 



THORACIC AORTA. 



From seventh dorsal to pillars of diaphragm. 



Branches. 



Intercostals, 17, the first from the cervical, the next three from 

 dorsal, and remainder from aorta. Divides into a superior branch 

 to muscles, skin and cord, and an inferior or intercostal behind 

 each rib, which anastomoses below with internal mammary. 



Broncho-cesophageal. 



By two branches to bronchi and lungs, by two to oesophagus, 

 and small branches to trachea, glands and mediastinum. 



ABDOMINAL AORTA. 



From diaphragm to bifurcation. 



Branches. 



Phrenic, two or three, to diaphragm. 



