21 



cells in which the intercellular bridges (prickles) are well shown, 

 noting as well the shape and size of the cells and their nuclei. 



17. Epidermis. Human finger. Section slightly oblique 

 with the surface. Fixed in ; paraifine ; sections 



fx ; stained with hematoxylin ; now in thin balsam. Mount 

 in balsam. 



This is an epithelium in which the scale-like superficial cells 

 form a very thick layer and their nuclei disappear. In the cells of 

 the deeper layers the nuclei are present. This preparation is to 

 illustrate the intercellular bridges in a stratified epithelium and also 

 to show the relation of the deepest cells to the connective tissue 

 upon which the epithelium rests. 



18. Follicular epithelium. Section of the ovary of a young 

 cat. ; paraffine ; sections fi. 



Stain with hematoxylin 5 minutes, eosin 15-30 seconds. The 

 o\'ary will contain eggs of various ages, covered with a follicular 

 epithelium of a single layer of cells or many layers of cells, depend- 

 ing upon the maturity of the follicle. The follicular epithelium in 

 the older follicles therefore is a stratified epithelium in which the 

 cells are all cuboidal, rounded, or polyhedral. Search the prepara- 

 tion to find ova covered with such an epithelium and note that the 

 cells are approximately alike, and not as in the ordinary stratified 

 or squamous epithelium. 



(10.) Glandular epithelium. Section of the soft palate. As- 

 signed for study. 



In the substance of the soft palate are contained numerous 

 mucous glands, illustrating glandular epithelium. The tubules of 

 the glands are made up of columnar cells with the nuclei in the 

 bases ; the epithelium in these glands is therefore a simple columnar 

 epithelium. 



19. Germinal epithelium. Section of the ovary of a kitten 

 2-3 weeks old. Hermann's fluid (§ 23) ; paraffine (§ 42) ; iron 

 hematoxylin (§ 98) ; sections ^i. 



The germinal epithelium is the cuboidal or low columnar 

 epithelium upon the surface of the young ovary, from which the ova 

 are developed. Examine the preparation, observing the surface 

 epithelium, with here and there a much enlarged cell with a large 

 round nucleus — a young ovum. 



