A reference handbook of the medical sciences, embracing the entire range of scientific and practical medicine and allied science . e bronchial tubes containing cartilages,are to be seen the muciparous ducts, lined withepithelium, leading inward to open on the free sur-face of the mucous membrane. The mucous crypts 513 Bronchi, Anatom)- of REFERENCE HANDBOOK OF THE MEDICAL SCIENCES Lie in the external fibrous layer, chiefly in the intervalsbetween the cartilages. The Mucous Membrane of the bronchia and bron-chioles, forming the internal layer, possesses, through-out the greater portion of its e
A reference handbook of the medical sciences, embracing the entire range of scientific and practical medicine and allied science . e bronchial tubes containing cartilages,are to be seen the muciparous ducts, lined withepithelium, leading inward to open on the free sur-face of the mucous membrane. The mucous crypts 513 Bronchi, Anatom)- of REFERENCE HANDBOOK OF THE MEDICAL SCIENCES Lie in the external fibrous layer, chiefly in the intervalsbetween the cartilages. The Mucous Membrane of the bronchia and bron-chioles, forming the internal layer, possesses, through-out the greater portion of its extent, the character-istics of tnat of the tracheal mucous membrane. Likethe latter, it consists of epithelial cells of the ciliatedcolumnar variety, superimposed upon a basementmembrane, which latter is made by a condensation ofthe inner part of the internal elastic lajer. When thetube has reached the diameter of millimeter {J^inch), these cells lose their cilia, become shorter,smaller, and rounded, in the ultimate tubules be-coming the simple pavement cells. Here the mem-brane its character as a mucous Fig. 1143.—a, A minute bronchiole splitting into the ultimatebranches, which terminate in the alveolar passages; the epitheliumhas become of the simple pavement variety: on the left branch canbe seen one of the so-called saccular dilatations; b, artery; c,medium-sized bronchiole ha\ing no cartilaginous lamina. The re-mainder of the field is normal lung tissue. (X about 30 diameters.)(Drawn by Dr. F. Cary, from a microscopical section, with camera.) and resembles that which lines the alveoli (see articleLungs, Anatomy of the.) Here and there in the largertubes are to be found the cup-shaped cells (Becher-zellen) of Schulze. The mucous crjpts are not onlyextremely numerous but relatively large. They aremuch more in evidence in the intercartUaginous in-tervals. As a rule they are small, racemose glands,often having a veritable excretory duct with ramifica-t
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Keywords: ., bookauthorbuckalbe, bookcentury1900, bookdecade1910, bookyear1913
