. Diseases of the nose and throat . Fig. 36.—Diagram to show the lymphatic drainage of the differentparts of Waldeyers ring (after Escat). P, Pharyngeal tonsil; T,Tubal tonsils; A, Faucial tonsils; L, Lingual tonsil. The lymphatic glands into which they drain are: 1, Retropharyngeal;2, Styloid; 3, Lateral pharyngeal; 4, Behind sternomastoid; 5, Bifurca-tion; 6, In front of sternomastoid; 7, Angle of jaw; 8, Hyoid; 9, Sub-hyoid. 170 THE TONSILLAR RIN(; 171 this ring become well-defined structures of which four areof special importance; the single pharyngeal tonsil at theapex of the ring in the
. Diseases of the nose and throat . Fig. 36.—Diagram to show the lymphatic drainage of the differentparts of Waldeyers ring (after Escat). P, Pharyngeal tonsil; T,Tubal tonsils; A, Faucial tonsils; L, Lingual tonsil. The lymphatic glands into which they drain are: 1, Retropharyngeal;2, Styloid; 3, Lateral pharyngeal; 4, Behind sternomastoid; 5, Bifurca-tion; 6, In front of sternomastoid; 7, Angle of jaw; 8, Hyoid; 9, Sub-hyoid. 170 THE TONSILLAR RIN(; 171 this ring become well-defined structures of which four areof special importance; the single pharyngeal tonsil at theapex of the ring in the pharyngeal vault, the two faucialtonsils, one on each side between the pillars of the fauces,and the single lingual tonsil at the base of the parts of the ring are represented by lymphoid tissueabout the Eustachian tubes, in the fossae of Rosenmiiller. Fig. 37.—Diagram of a section of a faucial tonsil, showing crypts,follicles and capsule. This tonsil is of the submerged type, and thecrypts irregular and dilated (Barnes). along the lateral fold of the pharynx, and often in smallislands irregularly scattered on the posterior pharyngealwall. The development of the tonsillar ring begins infetal life, and continues in childhood. In the second dec-ade of life the upper part of the ring largely disappears,while the lower portion remains although tending to be-come gradually smaller. 172 DISEASES OF THE NOSE AND THROAT The different tonsils are developed from the mucousmembrane by invaginations of the epithelium which ulti-mately become the crypts. These vary in size from analmost microscopical duct in a small isolated gland in themucous membrane, to the deep clefts of an adenoid, ordeep subdivided pockets of the faucial tonsil. This systemof crypts communicates with the external surface and pene-trates to the bottom of each tonsillar ma
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Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectnose, bookyear1915
