SYSTEMATIC SYNTHESIS OF TISSUES. 



173 



the whole of these covered or lined with appropriate 

 cells. Fig. 88. 



FIG. 136. 



I 



Fig. 136 is a rude plan of the same parts as in 123. a, Basement mem- 

 brane ; b, cells ; c, fibrous under-structure ; all as in an extended mem- 

 brane, without indentations or eminences. 



Fig. 137 represents the same, forming a short tube at g, a pouch, crypta 

 or follicle at h, and a coiled long tube at i. 



FIG. 138. 



Fig. 138 represents, by a rude plan, different modes of increasing sur- 

 face, & and I being simple follicles, with sides a little corrugated. At o is 

 the outlet to three like I, while m is the common outlet of many, or of a 

 racemose gland. At D there is a common outlet of many tubes, or of a 

 tubular gland. I is, in fact, a simple gland. 



119. GLAND is the name given to any means taken 

 for increasing the number of cells in a given space. 



Describe Fig. 88 in reference to surface. 

 119. What is a f 



Describe Fig. 136. Fig. 137. Fig. 138. 



