. Elements of histology. Histology. 184 Elements of Histology. [Chap. from the crescent cells. This is improbable, since, during ordinary conditions of secretions, there is no disappearance of the mucous cells as such ; they change in size, be- coming larger during secre- tion, and their contents are converted into perfect mucus. It is probable that, on pro- longed exhaus- tive stimula- tion, the mucous cells collapse into the small cells, seen by Heidenhain and his pupils. 246. The alveoli of the sub-lingual of the dog are again different in structure both from those of the sub-maxillar
. Elements of histology. Histology. 184 Elements of Histology. [Chap. from the crescent cells. This is improbable, since, during ordinary conditions of secretions, there is no disappearance of the mucous cells as such ; they change in size, be- coming larger during secre- tion, and their contents are converted into perfect mucus. It is probable that, on pro- longed exhaus- tive stimula- tion, the mucous cells collapse into the small cells, seen by Heidenhain and his pupils. 246. The alveoli of the sub-lingual of the dog are again different in structure both from those of the sub-maxillary of the dog and of the sub-lingual of guinea-pig, for the alveoli are there lined either with mucous cells or with columnar albuminous cells, or the two kinds of cells follow one another in the same alveolus. This gland is a sort of intermediate form be- tween the sub-lingual of man and the sub-maxillary of man and ape, , the mixed or muco-salivary glands. In these the great number of alveoli are serous, , small, with small lumen, and lined with albuminous cells, whereas there are always present a few alveoli exactly like those of a mucous gland. The two kinds of alveoli are in direct continuity with Fig. 103.—From a Section through the Orbital Gland of Dog, after prolonged electrical stimulation. The alveoli are lined with small granular cells. (Lavdovski.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Klein, E. (Edward), 1844-1925. Philadelphia : H. C. Lea's Son
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