Chap. II. The Anatomy of a HOKSE. ii 



The Mefentery, which in the next place, ^!->e Mefenterj, 

 comes properly to be defcribed, is ib called 

 from its Situation in the middle of the Guts. Its Rife is 

 from the third Rack- bone of the Loins, and is compofed 

 of three Membranes, the middlemoft being very full of 

 Kernels or Glands, which, when they happen to be over 

 much dilated, obftruft the Paflage of the Chyle, which 

 runs acrofs its Membranes ; and the Body being thereby 

 depriv'd of its Nourifhment, becomes lean and emaciate, 

 and at length falls into irrecoverable Difeafes. 



At its Rife it is gathered together in a vaft many Plaits 

 or Folds, which being open on that part of it to which the 

 Guts adhere, makes them lie in thofe Circumvolutions 

 and Turnings, in which we always obferve them : And 

 this feems abfolutcly neceflary, becaufe if they were not 

 tied in fuch a manner, but let loofe, the Excrements woulJ 

 either pafs too quickly through them, or elfe be wholly 

 obftrufted, by reafon they would be apt to twift and en- 

 tangle one with another. 



In a Horfe, the Mefentery is ufually above a quarter of 

 a Yard in Breadth ; and befides, in the milky Veilels, which 

 are fuftained by it, it has abundance of Lymphaticks, 

 which fcrvc to dilute the Chyle. Its Veins 

 are Branches of the Porta ; and its Arte- Its Vejfeh, 

 ries the Meferaick or Alefentenck : As to its 

 Ufe, it is fufficiently demonftrable from vi'hat has been 

 already faid concerning it, and the Guts. 



TABLE I. reprefents the Guts, as they appear after 



the Caul is taken away, 



AAAA. Sheweth the Gut Colon, 'with all its Cinum- 

 volutions and Folds, zvith the fmall Necks, -ivhich divide 

 it into three Parts ; as alfo the Space which it takes up 

 in the loiver Belly. 



B. the CsECum or Blind Gut. 



C. The Rc6tum or Streight Gut. 



D. Part of the Diaphragm, or Midriff. 



E. The Yard. 



F. The Glaus or Nut. 



G. The Fwidament zvith its SphinSler. 



§ IV. 



