Chap. II. The Jnatomy of a HOKSE. 13 



Pipes detach'd from them, thro' all Parts of it, to the 

 abovementioned Dud. As for the further j^^ jj. 

 Ufes of the Sweetbread, I Ihall only take 

 Notice, that as it lies acrofs under the lower Part of the 

 Stomach, it not only contributes to its Warmth, but may 

 help to keep it fomewhat elevated ; by which means its 

 mufcular Adion is not hindred, as it might probably 

 be when full, if its Weight was not fupported. 



The Antients belicv'd the Liver to be the ^^ H-ver, 

 chief Inftrument of Sanguification ; neither 

 could they be much blamed for this Opinion, it being 

 agreeable to the firft Difcoveries made in Anatomy. 



Its Subftance is flefhy, fomewhat refembling congealed 

 Blood : It is fituated on the upper Part of the lower Belly, 

 on the right Side, under the ftiort Ribs. The Liver of a 

 Horfe has four Lobes, which grafp the Stomach, and keep 

 it warm. It is tied by three Ligaments ; the chief of which 

 is called its Sujpenforyf and is a Produdion of the Pen- 

 tonecum ; it is very llrong and nervous, arifing from the 

 Midriff towards its right Side, and is inferted in the thick- 

 eil Part thereof, where its uppermoft Cover, expanding it- 

 felf, forms the proper Tegument of the Liver ; another Li- 

 gament fixed to the Point of the Breall-bone, in conjundion 

 with the firft, keeps it fufpended in fuch manner, that it 

 can neither fall downwards nor fideways. The Umbilkal 

 Vein, by which the Fcctus is nourifli'd, becomes its third 

 Ligament, which is veiy necellary in a Horfe, becaufe it 

 preferves the Liver, in galloping or leaping, from falling 

 forwards, and bearing too hard upon the Midriff. 



Its Veins are the principal Branches of j^^ fe/nis 

 the Cava^ or hollow Vein, wbofe other 

 Branches receive all the Blood which is brought in by the 

 Porta, forming the hollow Vein abovemention'd, by a 

 Combination of all their Roots into one great Trunk. 

 The Porta (ib called from its Office) is form'd from the 

 Branches which have been already obferv'd to come from 

 the Spleen, Sweetbread, and Guts, ^V. Its Arteries are 

 from the Caliac, and its Nerves from the Int^rcoftals, ^c. 

 Its lymphatick Vefl'els take the fame Courfe, as thofe of 

 the Spleen and Pancreas. 



Though a Horfe has no Gall Bkd- The Vorw Bi- 

 der, yet he wants not fufikient ftore of harius or 

 Gaily which is feparated by its proper Gall Bladder, 

 VeifQls, and convey'd diredly into the firft Gut, about 



ten 



