Diseases of the nose and throat; a text-book for students and practitioners . l faucial tonsils is still open forinvestigation. In the vault of the pharynx is an aggregation of follicularglands, known as the pharyngeal, third, or Luschlcas anatomical structure is similar to that of the faucial tonsils. 154 DISEASES OF THE NOSE AND THROAT. Its physiological function is said to be that of lubricating theparts directly below, of absorbing waste nasal and lachrymalsecretions while the body is recumbent, and of aiding blood for-mation. It is a reddish mass, and projects somewhat from the
Diseases of the nose and throat; a text-book for students and practitioners . l faucial tonsils is still open forinvestigation. In the vault of the pharynx is an aggregation of follicularglands, known as the pharyngeal, third, or Luschlcas anatomical structure is similar to that of the faucial tonsils. 154 DISEASES OF THE NOSE AND THROAT. Its physiological function is said to be that of lubricating theparts directly below, of absorbing waste nasal and lachrymalsecretions while the body is recumbent, and of aiding blood for-mation. It is a reddish mass, and projects somewhat from thelevel of the surrounding mucous membrane. Until recently abursa (pharyngeal bursa) was believed to have an anatomicalexistence in the centre of the pharyngeal tonsil. It is a fissure,presumably the remains of a foetal fissure, in the centre of ial cavityRight posterior nari» Basilar process Left middle turbinated Left inferior turbinated Soft palate Mouth Pharyngeal wall, stitched back Laryngeal vestibulArytenoid covering Entrance to tEsophaguPosterior wall of Nasal septum Uvula Posterior faucial pillar Tonsil Tongue Epiglottis Ary-epiglottic foldPyriform sinui Common carotid Fig. 57.—Key to Fig. 55. which is a small opening. Ganghofner says the so-called bursapharyngea is a more or less deep depression or cavity. Theopening of this depression is sometimes quite small, and, doubt-less, retention cysts of considerable size occur, owing to theinflammatory narrowing or closure of this opening. Besidesthe pharyngeal tonsil, the naso-pharynx contains numerousisolated follicular and conglomerate glands. The lingual, or fourth tonsil, situated at the base of the ANATOMY AND PHYSIOLOGY OF PALATE AND PHARYNX. 155 tongue, directly in front of the epiglottis, seems to have uses inthe economy similar to the other tonsils. It receives much ofits fluid for absorption from the tip of the uvula. All of thetonsils are analogous to Peyers patches. The throat, pharynx, or pharynge
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