Hand-book of physiology (1892) (14785154833)

Identifier: handbookofphysio00bake (find matches)

Title: Hand-book of physiology

Year: 1892 (1890s)

Authors: Baker, W. Morrant, (William Morrant), 1839-1896 Harris, Vincent Dormer Kirkes, William Senhouse, 1823-1864. Hand-book of physiology. 13th ed

Subjects: Physiology Human physiology

Publisher: London : John Murray

Contributing Library: Francis A. Countway Library of Medicine

Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School

Text Appearing Before Image:

ecular process.Within the alveoli of the cortex and in the meshwork formed by thetrabeculee in the medulla, is contained the proper gland structure.In the former it is arranged as follows : occupying the central andchief part of each alveolus, is a more or less wedge-shaped mass ofadenoid tissue, densely packed with lymph corpuscles ; but at theperiphery surrounding the central portion and immediately nextthe capsule and trabeculee, is a more open meshwork of adenoidtissue constituting the lymph sinus or channel, and containing fewerlymph-corpuscles. The central mass is enclosed in endothelium, 406 ABSOKPTION. (ch. ix. the cells of which join by their processes, the processes of theadenoid framework of the lymph sinns. The trabecule are alsocovered with endothelium. The lining of the central mass doesnot prevent the passage of fluids and even of corpuscles into thelymph sinus. The framework of adenoid tissue of the lymphsinus is nucleated, that of the central mass is non-nucleated. At

Text Appearing After Image:

Fig. 270.—Diagrammatic section of lymphatic gland, a.l., afferent; e.l., efferent lympha-tics; C, cortical substance; l.h., reticulating cords of medullary substance; l.s.,lymph-sinus ; c, fibrous coat sending in trabeculse ; t.r., into the substance of thegland. (Sharpey.) the inner part of the alveolus, the wedge-shajDed central massdivides into two or more smaller rounded or cord-like masseswhich joining with those from the other alveoli, form a muchcloser arrangement of the gland tissue than in the cortex ; spaces(fig. 271, b), are left within those anastomosing cords, in whichare found portions of the trabecular meshwork and the continua-tion of the lymph sinus. The essential structure of lymphatic-gland substance resemblesthat which was described as existing, in a simple form, in theinterior of the solitary and agminated intestinal follicles. The lymph enters the gland by several afferent vessels, whichopen beneath the capsule into the lymph-channel or lymph-path -at the same

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1892

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