. A Reference handbook of the medical sciences : embracing the entire range of scientific and practical medicine and allied science. bly arisefrom retained and decomposed epithelial matter, and per-haps, now and then, from the bursting of follicles whosecells have increased by proliferation and have undergonea retrograde metamorphosis and fatty degeneration. In its minute anatomy the tonsil is for the most partlike other so-called adenoid glands. In common with therest of the oral cavity it is invested with a thick coveringof pavement epithelium. Proceeding from without in-ward, the surface ep
. A Reference handbook of the medical sciences : embracing the entire range of scientific and practical medicine and allied science. bly arisefrom retained and decomposed epithelial matter, and per-haps, now and then, from the bursting of follicles whosecells have increased by proliferation and have undergonea retrograde metamorphosis and fatty degeneration. In its minute anatomy the tonsil is for the most partlike other so-called adenoid glands. In common with therest of the oral cavity it is invested with a thick coveringof pavement epithelium. Proceeding from without in-ward, the surface epithelium is scaly, each cell having aflattened, circular nucleus. Beneath this the cells andtheir nuclei become less flattened. Still lower are foundseveral layers of polyhedral cells, which have sphericalnuclei and are connected together by intercellular cementsubstance, and are furnished with prickle cells. Thewhole rests upon a single layer of columnar epithelialcells with oval nuclei, and is furnished abundantly withsimple papillae. Under the epithelium is a delicate en-dothelioid basement membrane. Following this is a 129. REFERENCE HANDBOOK OF THE MEDICAL SCIENCES. tolerably compact mucosa formed of interlacing bandsof fibrous connective tissue and containing many connec-tive-tissue corpuscles. In the normal adult tonsil thisstructure is so delicate that sometimes it is hardly rec-ognizable. In chronic disease of the gland it may be-come enormously increased. From it bands of connec-tive tissue extend centrally into the larger tonsillar}folds, and the whole forms essentially both an enclosureand a framework for the adenoid tissue or proper sub-stance of the gland, as well as a nidus for its vessels. The adenoid tissue consists of a dense meshwork of fine,homogeneous fibrils which contains, besides occasionalendothelioid connective-tissue cells, a large number oflymph-corpuscles. These are small, round cells, each ofwhich has a distinct spherical nucleus s
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectmedicine, bookyear188
