l04 The Anatomy of a HORSE. 



- r>.^ .7 • the Emulgent Arteries, one on each Side, 



lu Dijinbution. ^^^^^ ^^ ^^ ^^^ Kidneys ; and below thefe 



from the main Trunk alfo arife the Spermatic h^ which go 

 to the Tefticles and Ovaria^ h'c. Then the lower Me- 

 fenterick communicating with the upper, fupply the whole 

 Mefentery. 



As Toon as the Trunk of the great Artery has reached 

 the Top of the Os Sacrujji^ it dfvides itfelf into two equal 

 Branches, called the lliacks^ which are again fubdivided 

 into the External and InternaL From the Internal pro- 

 ceed thofe called Mufciila^ which are bellowed on the Pfoas 

 and Mufcles of the Buttocks ; as alfo the Hypogajhicksy 

 which run to the ftreight Gut, the Matrix^ and Bladder, 

 the P reflates and Yard, and to all the other Parts con- 

 tained within the Pelvis, From the External Iliacks 

 arife firft the Epigajhick Jrteries^ which turning for- 

 wards, creep along the Outfide of the Rim of the Belly, 

 as far as the Navel, where they meet the Mammillary, 

 The next are thofe called the Pudenda^ which go to the 

 Privities of both Sexes. Afterwards the Iliack Branches 

 go to the Thighs, and are then called the Crural JrterieSy 

 fupplying the hind Legs and Feet wiih many confiderable 

 Branches. 



This is the Order and Diftrlbution of the principal Ar- 

 teries of almoft all Animals, each of whicli Arterie3 arc 

 fubdivided into others, and thefe again into others, till at 

 laft the whole Body is overfpread with moft minute capil- 

 lary or Hair-like Arteries, which frequently communicate 

 one with another ; fo that when any fmall Artery is ob- 

 ftru<^ed, the Blood" is brought by the communicating 

 Branches to the Parts below the Oblli ut^tion, which muft 

 otherwife have been deprived of its Nourifliment. Nature 

 has obferv'd the fame Oeconomy in the Diftribution of the 

 Veins, that in cafe any Vein fhould be obllruded, the 

 Blood might not ftagnate, but be alfo rcturn'd by other 

 communicating Branches. 



fj-j^ J ,. But before I proceed to an Account of 



njer • lirovv the Veins, I fliall obferve farther concerri- 



and endued ^^g ^^""^ Arteries, that as it is their peculiar 

 rujitb a Sprit/g. Province to carry the Blood from the Heart, 

 and diftribute It Jnto all Parts of the Body, 

 they are perfedly fitted for that Purpofe by their Struc- 

 tures : f^cr an Artery being compofed of three Coats, the 

 middlemoii: veiy llrong, aiid endued with Eiafticity, by 



virtue 



