50 rhe Anatomy of a H OS.SE, Chap. IV. 



ihe Food from pafling into the Gullet, and makes it apt 

 to return back into the Nofe. 



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



^' ' 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 inferted into the Pores and Holes of the 

 outward Coat. 



It is of a llefliy Subftance, having VelTels of all Sorts, to 

 wit, Veins from an inward Braftch of the external Jugu- 

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

 and eighth Pair. 



Inhere are alfo belonging to the Tongue feveral Mufcles, 

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

 after. Thefe Mufcles are interlarded with a confiderabl<? 

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

 their A6tion. 



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 

 Dti^s^ do fpring ; one from the Fore, and another fjom 

 the Hind-part ; thefe two are fooji 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 iide this Du6t, and difcharge themfelves 

 into it. This Pipe ends in other Imall Glands towards the 

 Franum or Bridle of the Tongue, which difcharge fome 

 Part of that Slaver which keeps the Mouth continually 

 moid. Befides this Du6l, there are two others of the fame 

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

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

 the Middle of the Cheek, where they open into the 

 Mouth. 



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

 Spittle in Men, and ferves continually to moilten the 

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

 chewing, and being fwallowcd down with the Aliment, it 

 fc believed by fome Anali^miits to contribute to Digeftion. 



TAB. IV. 



