. Cunningham's Text-book of anatomy. Anatomy. 1124 THE DIGESTIVE SYSTEM. LINGUA. The tongue is a large mobile mass, which occupies the floor of the mouth and forms the anterior wall of the oral part of the pharynx (Fig. 889). It is composed chiefly of muscular tissue, and is covered by mucous membrane. Whilst the sense of taste resides chiefly in its modified epithelium, the tongue is also an important organ of speech, and, in addition, it assists in the mastica- Middle concha Middle meatus of nose Inferior meatus of nose Superior meatus of nose Sphenoidal sinus Inferior concha. Posterior edge
. Cunningham's Text-book of anatomy. Anatomy. 1124 THE DIGESTIVE SYSTEM. LINGUA. The tongue is a large mobile mass, which occupies the floor of the mouth and forms the anterior wall of the oral part of the pharynx (Fig. 889). It is composed chiefly of muscular tissue, and is covered by mucous membrane. Whilst the sense of taste resides chiefly in its modified epithelium, the tongue is also an important organ of speech, and, in addition, it assists in the mastica- Middle concha Middle meatus of nose Inferior meatus of nose Superior meatus of nose Sphenoidal sinus Inferior concha. Posterior edge of nasal septum Orifice of auditory tube Bursa pharyngea Part of the pharyngeal tonsil Lateral recess of pharynx Torus levatorius Salpingo- pharyngeal fold Glands in soft palate Giosso- palatine arch Supra-tonsillar fossa Plica triangularis Palatine tonsil Pharyngo-palatine arch Genioglossus Epiglottis Aryteno- epiglottic fold Cricoid cartilage Genio-hyoid Lymph follicle Hyoid bone Fig. 889.—Sagittal Section theough Mouth, Tongue, Larynx, Pharynx, and Nasal Cavity. The section was slightly oblique, and the posterior edge of the nasal septum has been preserved. The specimen is viewed slightly from below, hence the apparently low position of the inferior concha. tion and deglutition of the food—functions which it is well fitted to perform, owing to its muscular structure and great mobility. In length it measures about three and a half inches (9 cms.), when at rest, but both its length and width are constantly varying with every change in the condition of the organ, an increase in length being always accompanied by a diminution in width, and vice versa. In describing the tongue we distinguish the following parts: the corpus linguae (body), made up chiefly of striped muscle, and forming the mass of the organ; the dorsum linguse (Fig. 890), which looks towards the palate and pharynx, and is free. Please note that these images are extracted from scanned page images that may have
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