i8 

 THE EPITHEUAL TISSUES. 



LABORATORY WORK FOR THE WEEK. 



References : 

 Points for Quiz : 

 Laboratory Report : 



Due : 



Go to the delivery desk for slides assigned for study, 6, lo, 14, 

 and 19. 



Prepare a clean slide with albumen fixative (§ 67, a) and go to 

 the delivery desk for 18, parafBne section ; carry on according to 

 §§ 67, a -70. 



From the bottle on the delivery desk place a small drop of 

 glycerin jelly on the center of a clean slide and go to the instructor 

 for 9 and 16, already stained. Cover (§ 105). 



Go to the delivery desk with a clean slide for 17, now in thin 

 balsam. Mount in balsam (§109). 



Go to the desk for 7 ; in glycerin ; place a drop on the slide 

 and cover it (§ 104). 



Clean carefully and seal (§ no) the preparations of ciliated 

 cells from the trachea, made last week (8). 



COLUMNAR EPITHELIUM. 



6. Small intestine. Cat. Assigned for study. Transec- 

 tion. Flemming's fluid fixation (§ 24) ; parafiine (§ 42) ; saf- 

 franin stain (§ 79) ; sections 10 /x. 



Study the epithelium covering the villi, noting the two kinds 

 of cells and the structure of each ; the position and shape of the 

 nucleus ; the striated border ; the relation of the epithelium to the 

 underlying tissue. Find a place showing a surface section of the 

 epithelium. 



7. Epithelial cells from the small intestine. 



Isolated in Miiller's fluid dissociator (§ 4) ; now in alum-carmine 

 and eosin glycerin (§ 156). 



