SYSTEMATIC SYNTHESIS OF TISSUES. 



171 



Blood and Lymph cells (the red and white Blood-cells), 

 Fig. 110; 2d, the cells of the external skin (the cuticle), 

 called the cuticular cells, Fig. 109; 3d, the cells of the 

 surface of the air and food passages, secreting mucus, 

 hence called mucus cells, also epithelial cells, Figs. 88, 

 77 ; some of them are furnished with cilia, and are called 

 ciliated cells ; 4th, the cells of all the surfaces of all the 

 organs moving against each other, secreting serum, 

 hence called serous cells, also called pavement or tessel- 

 lated cells. Others of minor importance will be noticed 

 in connection with the organs to which they belong. 



FIG. 124. FIG. 125. FIG. 126. 



Describe Fig. 124, 125, 126. Describe Fig. 127. Describe the Figures from 12S 

 to 185, 



