S o The Anatomy ^/ <? H O R S E. Chap. IV. 



the Food from palling into the Gullet, and makes it apt 

 to return back into the Nofe. 



-.. ^ In defcribing the Tongue^ I need fay no- 



J? orgu . thing as to its Figure, it being fufficiently 

 known to every one. It is cover'd with two Membranes, 

 the outward cloathing only its upper Part, being alfo very 

 porous. The inward Membrane covers the whole Tongue, 

 and is thin and foft, having many Protuberances branching 

 out of it, which are infei ted into the Pores and Holes of the 

 outward Coat. 



It is of a flefliy Subftance, having Veflels of all Sorts, to 

 •wit, Veins from an inward Branch of the external Jugu- 

 lars, Arteries from the Carotids, and Nerves from the fifth 

 and eighth Pair. 



There are alfo belonging to the Tongue feveral Mufcles, 

 by which all its Motions are performed j but of them here- 

 after. Thefe Mufcles are interlarded with a confiderable 

 deal of Fat, which, no doubt, ferve fomewhat to facilitate 

 their Aftion. 



The Ufe of the Tongue is not only for Tafte, but alfo 

 to ferve as an Inftrument to turn every thing taken in at the 

 Mouth, that it may be the more expeditioully chewed, and 

 afterwards to thruft it backwards towards the Stomach. 



Underneath the Root of the Tongue there is a pretty 

 large Kernel, from whence two Pipes, called the Salival 

 DuHs^ do fpring ; one from the Fore, and another from 

 the Hind-part ; thefe two are foon united into one, which 

 runs towards the Chin. But Dr. Wharton has obferved, 

 that in a Horfe there are other pretty remarkable Glands 

 that Hand on each fide this Dud, and difcharge themfelvea- 

 into it. This Pipe ends in otherlinall Glands towards the 

 Franum or Bridle of the Tongue, which difcharge fome 

 Part of that Slaver which keeps the Mouth continually 

 moifl. Belides this Duft, there are two others of the fame 

 ufe, which arile out of the Kernels under the Ear, called 

 the Parotides^ and run on the Ouifide of the Jaw-bone to 

 the Middle of the Cheek, where they open into the 

 Mouth. 



The Ufe of the Slaver is the fame with the Saliva or 

 Spittle in Men, and fcrves continually to moiften the 

 Mouth, and all the folid part of the Food, whilft it is in 

 chewing, and being fwallowed down with the Aliment, it 

 is believed by fome Anatomifts tg cyntribuie to Digeftion. 



TAB. IV, 



