The American journal of anatomy . sophageal glands of man is clearly taken. The character of the mucous cells forming the secreting tubulesis well shown in Fig. 12. Protoplasmic cells containing no mucin asdescribed by Schaffer occur also in my preparations, whole groups 30 Goetsch. of tubules being of this character. These I interpret, as did Schafler,as temporarily inactive mucous cells. These tubules are always sur-rounded by a tissue containing large numbers of plasma cells. The ducts of the glands (Fig. 12) are lined by a stratified epitheliumexcept in the very beginning in the gla
The American journal of anatomy . sophageal glands of man is clearly taken. The character of the mucous cells forming the secreting tubulesis well shown in Fig. 12. Protoplasmic cells containing no mucin asdescribed by Schaffer occur also in my preparations, whole groups 30 Goetsch. of tubules being of this character. These I interpret, as did Schafler,as temporarily inactive mucous cells. These tubules are always sur-rounded by a tissue containing large numbers of plasma cells. The ducts of the glands (Fig. 12) are lined by a stratified epitheliumexcept in the very beginning in the gland where for a short distance,only 12 micra in some cases, a single layer of cylindrical cells isfound. The intralobular ducts have a double layer of cells and thelarge ducts in the submucosa two to four layers of cells, the numberof layers increasing as the surface of the mucosa is approached. Theshape of the cells varies with the degree of tension of the surface,produced either by distension of the duct with secretion or by the. M (ironstubules Fig. 12. Portion of a lobule of an oesophageal gland of man, showingentrance of duct and transition of duct epithelium to glandular Lobular duct. B. Transitional duct lined by simple columnar formation of folds in the mucous membrane. In the relaxed ductthe superficial layers of cells are cylindrical, the deeper layers poly-gonal except very near the epithelium, where the epithelium becomesstratified squamous. In the distended or stretched duct both super-ficial and deeper layers of cells become more or less fusiform in sec-tion. In all cases the superficial layers of cylindrical or flattenedcells stain more strongly in eosin than the second layer, indicatinga probable change in a slight degree of the protoplasm in the direc-tion of cornification. As regards the superior cardiac glands of Schaffer and KiidingerI have been able to make no study of them owing to the absence of The Structure of the Mammalian
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1910
