164 ANATOMY AND PHYSIOLOGY FOR NURSES 



gastric juice becomes thoroughly mixed with the food, 

 while the digestion of the latter goes rapidly on. 



FIG. 82. Cardiac glands : Diagram showing the relation of the ultimate 

 twigs of the blood-vessels ( Fand A), and of the absorbent radicals (L) to 

 the glands of the stomach, and the different kinds of epithelium namely, 

 above, cylindrical cells ; small pale cells in the lumen ; outside which are 

 the dark ovoid cells (Yeo). 



The gastric juice is a clear, colorless fluid-acid reaction, 

 with a specific gravity of 1005 ; its composition is as follows : 



Water 994.404 



Hydrochloric acid 0.200 



Organic matter (pepsin) 3 .195 



Inorganic salts 2.201 



1000.000 



It will be noted that the water forms the largest part 

 of this fluid, and serves to hold the other ingredients in 

 solution. The hydrochloric acid occurs in a free state, 

 and is secreted during the digestive action. It varies in 



