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PHYSIOLOGY FOR BEGINNERS 



FIG. 9. Capillaries of the web of a frog's foot very highly magnified. 

 A, wall of capillaries; B, tissue of the web in which the capillaries lie; C, large 

 many-sided cells of the thin skin covering the web ; D, nuclei of these cells ; 

 E, cells containing black pigment ; F, red corpuscles ; G, H, red corpuscle being 

 squeezed through a narrow capillary ; A", a capillary seen through the thin skin ; 

 /, colourless corpuscles. 



