346 



CHANGES IN GASTRIC CELLS. 



[Book n. 



transparent material, which, unlike the network itself and the 

 mass of cell-substance round the nucleus, does not stain with 

 carmine or with certain other dyes. The discharged cell in simi- 

 lar preparations (Fig. 81 b) differs from the loaded cell in the 

 amount of transparent non-staining material being much less and 

 chiefly confined to the inner part of the cell, while the protoplas- 

 mic cell-substance around the now large and well-formed nucleus 

 is not only, both relatively and absolutely, greater in amount, but 

 stains still more deeply than in the loaded cell. 



It would appear therefore that in the mucous cell, as in the 

 pancreatic cell, the cell-substance forms and deposits in itself 



Fig. 82. Gastric Gland of Mammal (Bat) during Activity. (Langley.) 



c, the mouth of the gland with its cylindrical cells. 



n, the neck, containing conspicuous ovoid cells, with their coarse protoplasmic 

 network. 



f, the body of the gland. The granules are seen in the central cells to be limited 

 to the inner portions of each cell, the round nucleus of which is conspicuous. 



certain material in the form of granules. During secretion these 

 granules disappear and presumably form part of the secretion. 



8 198. The ' central ' or ' chief ' cells of the gastric glands 

 also exhibit similar changes. In such an animal as the newt 



