. Journal of anatomy . ypts ofthe pars palatina are seen in sections to connnunicate with the supratonsillarfossa. When the human tonsil is examined in the same way, whether thefossa is cut transversely or longitudinally, crypts are found to be openinginto it, generally with secondary diverticula, within their own w^alls. The animals whose tonsils are here described show the principalvarieties met with in our dissections, others which are not described beingsimilar to one of the above-mentioned types. •The most primitive type of tonsil is a tubular diverticulum from thepharynx lined with epith
. Journal of anatomy . ypts ofthe pars palatina are seen in sections to connnunicate with the supratonsillarfossa. When the human tonsil is examined in the same way, whether thefossa is cut transversely or longitudinally, crypts are found to be openinginto it, generally with secondary diverticula, within their own w^alls. The animals whose tonsils are here described show the principalvarieties met with in our dissections, others which are not described beingsimilar to one of the above-mentioned types. •The most primitive type of tonsil is a tubular diverticulum from thepharynx lined with epithelium and surrounded by lymphoid tissue. Thisis seen in the tiger and leopard. (Plate IV. fig. 1.) At first sight it is not easy to correlate solid projecting tonsils, such asthose of the dog, and embedded tonsils, like those of the sheep or seal, withthe simple tube of the tiger. If, however, sections through the tonsils and macroscopic specimens be Anatomy of the Palatine Tonsils 51 Plate VIII.—MAMMALIAN Fig. 22.—Wain ii(,. 22(?..
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectanatomy, bookyear1867
