THE ARTERIES. 



225 



to the surrounding tissues, but chiefly to the mucous membrane 

 and Harder's gland. 



Fig- 145- 



Arterial system of liana esculenla.' 



(4) The internal carotid artery (Art. cerebralis, Virchow) ; see 

 Arteries of Brain, p. 162. 



(5) The ophthalmic artery [Art. ophthalmica), (Fig. 145 6) [is 

 larger than the internal carotid artery at this point ; it crosses the 

 origins of the M. rectus externns and of the M. retrahens hullji and 

 reaches the optic nerve; the artery then runs forwards along 

 the under surface of this nerve and of the eyeball, lying close to 

 the sclerotic coat as far as a little beyond the equator, where it 

 pierces the sclerotic coat so obliquely that the choroid coat is only 



