ti6o 



A MANUAL OF ANATOMY 



(3) temporal and malar offsets, which pass through the temporal 

 and malar canals of the malar bone to the face and temporal region, 

 in company with the temporal and malar branches of the temporo- 

 malar or orbital nerve ; (4) two external palpebral arteries, superior 

 and inferior, which pass inwards in the upper and lower eyelids, 

 and anastomose with the internal palpebral branches of the 

 ophthalmic, thus forming arterial arches ; and (5) glandular branches 

 to the lachrymal gland. 



The muscular branches arise from the ophthalmic in two sets. 

 outer and inner, and also from some of its branches, e.g., the lach- 

 rymal and supra-orbital. They furnish a few of the anterior 

 ciliary arteries. 



The supra-orbital artery arises from the ophthalmic as it crosses 



Internal Palpebral Arteries 

 Frontal Artery 



Nasal Artery 



Anterior Ethmoidal Artery 



Posterior Ethmoidal Artery 



Ophthalmic Artery 



Internal Ciliary Arteries 

 Ophthalmic Artery (in Optic Foramen) 



Lachrymal Gland 



} External Palpebral 

 Arteries 



upra-orbital Artery 



Lachrymal Artery 



Muscular Arteries 

 """~ Arteria Centralis Retinae 



External Ciliary Arteries 

 Internal Carotid Artery 



Fig. 473. — Diagram of the Ophthalmic Artery and its Branches. 



inwards over the optic nerve. It courses foiivards to the supra- 

 orbital notch, through which it passes, with the corresponding 

 nerve, to the forehead. It supplies the upper eyelid and the 

 frontal region, and anastomoses with the superficial temporal and 

 frontal arteries. 



The posterior ethmoidal artery, a small vessel, passes through the 

 posterior ethmoidal canal on the inner wall of the orbit, and is 

 distributed to the mucous membrane of the posterior ethmoidal 

 cells, and the mucous membrane of the upper and back part of the 

 outer wall of the nasal fossa. The latter branches pass through 

 foramina in the cribriform plate. 



The anterior ethmoidal artery is larger than the preceding. It 



