Atlas and epitome of human histology and microscopic anatomy - Tapa blanda

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1903 Excerpt: ...septa extend from the underlying tissue of the tonsil into its lymphatic tissue, so that each crypt or fossa has a wall consisting of one layer of secondary nodules. The tonsil is thus divided by the connective-tissue septa into a number of separate compartments. In the tonsils, as in all lymphatic tissues which are in connection with the epithelium, we can observe the growth and migration of the leukocytes through the epithelium. This process appears more distinct where it is connected with a stratified epithelium and where the leukocytes wander through in large numbers; this is the case in the tonsils. In the tonsillar crypts, certain areas of the stratified epithelium contain no leukocytes; iu some regions the leukocytes are found singly between the epithelial cells, while in others, groups of leukocytes are found in the epithelium; finally areas occur where the leukocytes wander through in such numbers that the epithelium is entirely filled by them and only a few groups of epithelial cells are to be seen between large masses of leukocytes. In this process the papilla? of the mucous PLATE 31.--TONGUE. Fig. 1.--Transverse Section through a Papilla Circumvallata of the Human Tongue. X 40. The preparation was taken from tissue flxed two and one-half hours after death. The figure shows the structure of the cireumvallate papilla, taste buds, and the serous glands surrounding it. Technic: Zenker's solution. Hcmatoxylin-eosin. Reference letters: rf, Excretory duct of gland; g, ganglion-cells;;jrAsfr, serous glands; Gkn, tuste buds; m, transversely striated musclefibers; n, nerve-filH'rs of the glossopharyngeal nerve; p, secondary papilla'; Ilf, cireular furrow around the cireumvallate papilla; Itir, cireular wall of the papilla. Fio. 2.--Transverse Section thro...