DIGES1 l<>\ 



135 



" 



FIG. 59. Diagram to illustrate the structure of glands. 

 A, Typical structure of a mucous membrane with two layers of epithelial cells, a, 6; 



c, the connective tissue beneath, with <, blood-vessels, and/jomncc live tissue cells. 

 />', The same with one layer of cells resting on /, the so-called basement membrane. 



i. A simple tubular gland; 2, a tubular gland dividing ; 3, a saccular gland; 



4, a divided saccul.tr gland with duct </; 5, a similar ^laiid more divided ; 6, a 



racemose tland, part <mly being drawn. In Kigs. 2-6 the bl<-ud-vc 



omitted. 



