THE MAST CELLS 





t -<L 



' ;:-: 



'f -■ 



' if 



■4 





, * 





M 



» -.4. 



- T 







r v 



Fig. 17 



Section, rat tongue. Note that here the mast cells lie deeply between the muscle 

 bundles. There is little loose connective tissue under the epithelium of the tongue 

 (which cannot be lifted off the muscle) and there are very few mast cells in the region. 



Toluidine blue ( 170). 



56 



