Chap. II. The Anatomy (?/ /« H O R S E. 13 



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

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

 Ufes of the Sweetbread, I IMI 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 Action 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 <^^ r .^, ^ 

 chief Inftrument of Sanguification ; neither 

 Gould they be much blamed for this Opinion, it being 

 agreeable to the firft Difcoveries made in Anatomy. 



Its Subftance is fielhy, fomewhat refembling congealed 

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

 on the right Side, under the fhort 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 Su/penfory, and is a Produflion of the Pm- 

 tonaum ; it is very fljong and nervous, arifing from the 

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

 eft 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 Breaft-bone, in conjundion 

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

 can neither fall downwards nor fideways. The Umbilical 

 Vein, by which the Fostus is nourifh*d, becomes its third 

 Ligament, which is very neceflary 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 y ^j 

 the Cava^ or hollow Vein, whofe other ^ W^ ^' 

 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 (fo called from its Ofiice) is form'd from the 

 Branches which have been already obferv'd to come from 

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

 from the Cceliac^ and its Nerves from the Intercoftals, l^c. 

 Its lymphatick Veflels take the fame Courfe, as thofe of 

 the Spleen and Pancreas. 



Though a Horfe has no Gall Blad- The Porus Bi- 

 der^ yet he wants not fufficient ftore of harius or 

 Gall, which is feparated by its proper ^ all Bladder. 

 VelTels, and convey'd diredtly into the firft Gut, about 



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