Manual of human histology . cted towards theepithelium ; internally to these, round, completely closed folliclesone close to the other, of the same size and possessing thesame contents as those previously described; and finally, a softfibrous tissue connecting them, and containing numerousvessels. The vessels are still more numerous than in thefollicles of the tongue, though their ramifications are essentiallysimilar, except that the pa-pillae frequently contain mul- ^tiple loops, and the networksaround the capsules are stillcloser (fig. 182). The fibrousinvestment, lastly, consists ofconnecti
Manual of human histology . cted towards theepithelium ; internally to these, round, completely closed folliclesone close to the other, of the same size and possessing thesame contents as those previously described; and finally, a softfibrous tissue connecting them, and containing numerousvessels. The vessels are still more numerous than in thefollicles of the tongue, though their ramifications are essentiallysimilar, except that the pa-pillae frequently contain mul- ^tiple loops, and the networksaround the capsules are stillcloser (fig. 182). The fibrousinvestment, lastly, consists ofconnective tissue, with elasticfibres and receives certainmuscular fibres from thesuperior constrictor of thepharynx. Nerves may bedetected on the external sur-face of the tonsil, and in the papillse, but, as in the case ofthe follicular glands of the root of the tongue, I have failedto observe them in the proper membrane of the follicles. Fig. 182. Vessels of a few follicles from a human tonsil, seen from the cavity of asac, X 32 SPECIAL HISTOLOGY. Corresponding with their structural similarity is the resem-blance in the secretion of the tonsils and that of the lingualfollicles, though the former is not easily obtained pure on accountof the tonsils also receiving the ducts of mucous glands. It is agreyish white mucous substance, which, however, so far as I havebeen able to observe, contains no mucus, but is composed eitherof cast-off epithelial plates alone, or of a mixture of these withcells and nuclei, perfectly identical with those contained in theparietal follicles of the tonsillar cavities. How these cells areformed and whence they arise, I know not. It would seemprobable that they proceed from follicles which have burst,a process which may really occur in man, though from whatis observed in animals we can hardly assume their dehiscenceto be a normal process.^ [In man, it is quite impossible, in a vast number of cases, tofind the follicles which we have described in the wall
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