An American text-book of physiology . , oxynticcells, etc. The last-mentioned name has been given to ihem because of theirsupposed connection with the formation of the acid of the gastric secretion. Thenature and function of these border-cells have been the subject of much discus-sion. From the histological side they have been interpreted as representingeither immature forms of the chief-cell, or else the active modification of thiscell. Recent work, however, seems to have demonstrated that they form aspecific type of cell, and probably therefore have a specific function. Aninteresting histolo
An American text-book of physiology . , oxynticcells, etc. The last-mentioned name has been given to ihem because of theirsupposed connection with the formation of the acid of the gastric secretion. Thenature and function of these border-cells have been the subject of much discus-sion. From the histological side they have been interpreted as representingeither immature forms of the chief-cell, or else the active modification of thiscell. Recent work, however, seems to have demonstrated that they form aspecific type of cell, and probably therefore have a specific function. Aninteresting histological fact in connection with the parietal cells is that, in thehuman stomach at least, they frequently contain several nuclei, five or six,and some of these seem to be derived from ingested leucocytes. They areinteresting also in the fact that they contain distinct vacuoles which seem toappear some time after digestion has begun, reach a maximum size, and thengradually grow smaller and finally disappear. I^ike the similar phenomenon. SECRETION. 179 described for other oland-cells (p. 167), tliis appearance is possibly connectedwith the formation of the secretion. The duct of a gastric gland was formerly supposed to be a simple tubeextending the length of the gland. A number of recent observers, however,have shown, by the use of the Golgi stain, that thisview is not entirely correct, at least not for the glandsin the fundus in which border-cells are present. Inthese glands the central lumen sends offside channelswhich pass to the border-cells and there form a net-work of small capillaries which lie either in or roundthe cell. An illustration of the duct-system of afundic gland is given in Figure 79. If this workis correct it would seem that the chief-cells com-municate directlv with the central lumen, but that fig. tu—Ducts and secretionthe border-cells have a system of secretion capillaries ^f f ^« ^o parietal oeiis. J i Gland from the fundus of cat s of their own, resembli
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