130 



THE HUMAN BODY. 



FIG. 40. Forms of Glands. A, a simple secreting surface ; a, its epithelium; 

 b, basement membrane ; c, capillaries ; B, a simple tubular gland ;,C, a secret- 

 ing surface increased by protrusions ; E. a simple racemose gland : D and G, 

 compound tubular glands; F, a compound racemose gland. In all but A, B, and 

 C the capillaries are omitted for the sake of clearness. H, half of a highly devel- 

 oped racemose gland ; c, its main duct. 



