EXTERNAL ANATOMY OF THE HORSES HEAD. 
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g, g. A strip of the palate, dissected up, to exhibit the position of 
the vessels and nerve beneath. 
h, k. The cheeks. 
i, i. The molars, or grinding teeth. 
EXTERNAL ANATOMY OF THE HORSE’S HEAD. 
PLATE III. Fig. 1. 
a, a. The orbicularis muscles, surrounding the eye, and destined 
for the purpose of closing the eyelids. 
b. The nasalis labii superioris takes its rise from a depressior 
at the junction of the superior maxillary and malar bones, 
and extending to the angle of the nostril. Its use is to 
raise the lip, and dilate the nostrils. 
c. Dilator magnus, or great dilator, which assists in the office 
of retracting the upper lip and in dilating the nostrils. 
d. Dilator naris lateralis, or side dilator of the nostrils, reversed 
to exhibit the vessels and nerves which it covers, extending 
from the covering of the nasal and frontal bones to the 
angle of the mouth and side of the nostril. Its office is to 
retract the upper lip, and dilate the nostrils. 
e. The zygomaticus , extending from the zygomatic arch and 
masseter to the corner of the mouth, for the purpose of 
drawing back the angle of the mouth. 
f, g . The orbicularis oris, or circular muscle of the mouth. This 
muscle surrounds the mouth for the purpose of closing the 
lips and dilating the nostrils. 
h. The buccinator, or trumpeter muscle, extending from the 
inside of the mouth and cheeks to the angle of the mouth, 
to draw r it back. 
t. Depressor labii inferioris, or puller down of the under lip, 
attached to the sides of the under lip to pull it down. 
j. Branches of nerves, with small blood-vessels. 
tc. The parotid duct, penetrating the cheek to discharge the 
saliva into the mouth. 
L See letter r, and explanation. 
m. The vein and artery passing under the zygomatic arch. 
n. A branch of the fifth pair of nerves, the sensitive nerve of 
the face, emanating from under the parotid gland. 
