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THE EPITHELIAL TISSUES. 



t-t/L 



LABORATORY WORK FOR THE WEEK. 



References: 

 Points for Quiz : 

 Laboratory Report : 



Due: 



Go to the delivery desk for slides assigned for study, 6, 10, 14, 

 and 19. 



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

 the delivery desk for 18, paraffine 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) ; paraffine ( 42) ; saf- 

 franin stain ( 79) ; sections 10 yu. 



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. C-o-fc 

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

 and eosin glycerin ( 156). 



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