_1_, Hard palate; _2_, tongue showing distinctly fungiform papillæ;
_3_, foliate papilla; _4_, lymph nodules of soft palate; _5_,
stylo-glossus muscle, out of which a portion has been cut; _6_,
hyo-glossus; _7_, genio-glossus; _8_, genio-hyoideus; _9_,
mylo-hyoideus (reflected); _10_, stylo-hyoideus; _11_, great cornu
of hyoid bone; _12_, tensor palati; _13_, levator palati; _14_,
pterygo- et palato-pharyngeus; _15_, stylo-pharyngeus; _16_,
chondro-pharyngeus; _17_, sterno- et omo-hyoideus; _18_,
retropharyngeal lymph glands; _a_, bulla ossea; _b_, paramastoid
process. (Ellenberger-Baum, Anat. d. Haustiere.)
]
The =parotid gland= is large and triradiate. It extends very little on
to the masseter muscle and its upper angle does not quite reach the base
of the ear. It is pale in color, and is embedded in fat in animals in
good condition. On its deep face are several large subparotid lymph
glands, some of which are only partially covered by the parotid. The
=duct= arises on the deep face, has a course similar to that of the ox,
and perforates the cheek opposite the fourth or fifth upper cheek tooth.
Small accessory glands (Glandulæ parotideæ accessoriæ) may be found
along the course of the duct.
The =submaxillary gland= is small, reddish in color, and oval in
outline; it is covered by the parotid. Its superficial face is convex,
and is marked by rounded prominences. From its deep face a narrow
process extends forward about two or three inches (ca. 5 to 7.5 cm.)
beneath the mylo-hyoideus muscle along with the duct. The latter opens
near the frenum linguæ, but there is no papilla.
[Illustration:
FIG. 311.—SAGITTAL SECTION OF PHARYNGEAL REGION OF PIG, PARTLY
SCHEMATIC.
_1_, Palate bone; _2_, sphenoid bone; _2′_, sphenoidal sinus; _2″_
occipital bone; _3_, epiglottis; _4_, arytenoid cartilage; _5_,
thyroid cartilage; _6_, root of tongue; _7_, mouth cavity; _8_,
isthmus faucium; _9_, hard palate; _10_, septum nasi; _11_, ventral
muscles of head; _a_, soft palate; _a′_, free edge of _a_; _b_,
dorsal wall of pharynx; _c_, fornix of pharynx; _d_, cavity of
larynx; _e_, _g_, naso-pharynx; _f_, oro-pharynx; _h_, posterior
pillar of soft palate; _i_, dotted line indicating lateral boundary
between nasal cavity and pharynx; _k_, aditus laryngis; _l_,
entrance to œsophagus; _m_, Eustachian orifice; _n_, pharyngeal
recess; _o_, posterior naris. (After Ellenberger, in Leisering’s
Atlas.)
]
[Illustration: