Atlas and text-book of topographic and applied anatomy . region between the mouth and the pharynx,should be studied as far as possible in the mouth of the reader with the aid of a hand-mirror andstrong sunlight. If the tongue is raised, the fraenum linguae may be seen in the median line, THE ORAL CAVITY. 55 and to either side will be observed the sublingual folds, which project in varying degrees in differ-ent subjects. These folds are due to the upper margins of the sublingual glands, and to theirinner side the submaxillary ducts may be exposed (for the extraction of salivary calculi, for ex-
Atlas and text-book of topographic and applied anatomy . region between the mouth and the pharynx,should be studied as far as possible in the mouth of the reader with the aid of a hand-mirror andstrong sunlight. If the tongue is raised, the fraenum linguae may be seen in the median line, THE ORAL CAVITY. 55 and to either side will be observed the sublingual folds, which project in varying degrees in differ-ent subjects. These folds are due to the upper margins of the sublingual glands, and to theirinner side the submaxillary ducts may be exposed (for the extraction of salivary calculi, for ex-ample). The posterior portion of the sublingual gland lies upon the mylohyoid muscle, while theremainder of the gland is closely related to the inner surface of the mandible, where it producesthe sublingual fossa of varying depth. The numerous invisible orifices of the gland are situatedupon the sublingual folds. The sublingual gland frequently possesses a larger duct [ductus Junction or* HARD AND SOFT PALATES POSTERIORPILLAR „s FAUCES FAUCIAL TONSIL. —FRAENUMLINGUAE OPENINGS OF . SUBMAXILLARYAND .SUBLINGUALGLANDS. FLOOR OF MOUTH RANINE ARTERY -View of adult mouth (modified from Spaltcholz): , Middle incisor; , lateral incist Bio, first bicuspid tooth (Eisendrath). r; C, canine tooth; major Rivini or duct of Bartholin; according to Cunningham, this rarely exists in man.—Ed.]which may unite with the submaxillary duct or have an independent orifice. The opening of thesubmaxillary duct (Whartons) may be recognized, with the naked eye, in the sublingual caruncleat the anterior extremity of the plica sublingualis. [This duct and the lingual nerve lie beneathand to the inner side of the sublingual gland; the nerve on its way to the tongue crosses the ducton its inferior aspect opposite the anterior border of the hyoglossus muscle.—Ed.] 56 TOPOGRAPHIC AND APPLIED ANATOMY. PLATE median sagittal section of the head. Frozen section. [Congenital dermoid cysts are frequ
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