X02 The Anatomy of a HORSE. 



Du£ls contradl themfelves at equal Diftances, and have alfq 

 their little Flood-gates, which permit their Liquor to take 

 its Courfe towards the Chyle- VefTels, but hinder its coming 

 back the fame Way ; by all which Means the animal Body 

 can never be deprived of its Nourifhment, but in Cafe of 

 Sicknefs or Want. 

 - ~ , The Chyle beine prepar'd in the Sfomach 



Jts Entrance in- , r n A . 1. l ur j j 



. ^^^ ^i^g^ and Imall Lruts, as has been obierved, and 



being alfo further refined by the Commix- 

 ture of the Lympha^ in its Paflage through the Ladleals and 

 Thoraick Du6t, is conveyed by that Canal to the left fub- 

 clavian Vein, where it opens itfelf at feveral Orifices, and 

 mixing with the Blood, is carried dire6tly to the right 

 Ventricle of the Heart, and is no farther to be traced under 

 the Name of Chyle, but henceforth becomeK a Part of the 

 Blobd. 



Now, that all the Blood takes a circular Courfe thro* the 

 Heart, is an Opinion fo generally received, that I need fay 

 nothing about it, but proceed to fhew the Way and Man- 

 ner by which that is perform'd. 



<Ihe Circulation The afcending and defcending Trunks of 

 of the Blood ^^ ^^^'^ ^"'^^ oppofite to the Heart, and 



thro the Hearty ^pen into its right Auricle, or Ear ; and at 

 ^V, ' the Place where they enter, there is a fmall 



Protuberance made by their Coats on the 

 Infide, like an I/lhmus^ which hinders the Blood of either 

 Trunk from rufhing againft the other, but directs both 

 into the Ear. The right Ear receives in its THajlok^ that 

 is, when it is diftended, all the Blood from both Branches 

 of the Cava., which it empties by its Syfiole into the right 

 Ventricle of the Heart, which at the f^mie Time is in its 

 Jpiaflole. The right Ventricle in its Sv/lole prefently 

 empties itfelf into the Pulmonary Artery, or that of the 

 Lungs, for it cannot return back again into the Ear, be- 

 caufe of the Valvules Tricufpides ; as that which is once 

 received into the Ear cannot return into the Cava, becaufe 

 of the tendinous Circle about its Mouth, which contracts 

 itfelf as often as the Ear is filled. As often as the Blood 

 has taken its Progrefs through all Parts of the Lungs, in the 

 Pulmonary Artery, it is receiv'd from its capillary Branch- 

 es, into thofe of the Pulmonary Vein, and is convey'd by it 

 back again into tl:ie left Ear of the Heart, which, by its Con- 

 itradion, thrulls the Blood into the left Ventricle', then in 

 ii6 Diajiok J and ',vhen that is contracted, it is thruft out 



into 



