EPITHELIAL TISSUES LAB
Professor of Biology and Chemistry
University of Cincinnati Clermont College,
Batavia OH 45103
This page has been accessed times since 2 October 2001.
8 October 1991, rvsd 18 October 1994, 12 Sept '95, 3 Oct '96, 16 Dec '96, 17 Sept '97, 11 Sept 99, 28 Sept 01
epithelium (top view)
First review and follow carefully the rules and regulations for microscope use. Also, be familiar with guidelines in Notebook Illustrations for these drawings.
Examine each of the following slides, note
the features in common
those which are differentiating. Illustrate each at 400x to take up
of a page. Include and label each listed feature, and give a brief
of its function or significance. Compare with the plates in
of Normal Human Histology, 9th Ed (VE).
|Thumbnail Image||Tissue type, slide, description||Features to label in your illustration|
|1. (slide 2) Simple squamous epithelium,
top view of peritoneum, a serous membrane (an example of mesothelium,
derived from mesoderm). It functions where a slick friction-free
is required, or ready exchange across membranes is essential: lung
capillary endothelium, kidney glomerulus
Here is a labeled view of simple squamous epithelium.
tiled appearance (its heterogeneity is due to variations in sample preparation)
|2. (slide 3) Simple cuboid epithelium,
section of kidney. In the cortex (outer portion) of the section, view
proximal convoluted tubules with brush borders.
Here is a labeled view of simple cuboid epithelium.
|proximal convoluted tubule
brush border (only on proximal convoluted tubules)
|3. (slide 4) Simple columnar epithelium,
c.s. of the intestine of a Nectarus (a newt).
Note the classic four functional layers of a GI wall, inside to outside: mucosa, submucosa, muscularis, and serosa.
Here is a 40x view of the villi.
Here is a labeled view of simple columnar epithelium.
lamina propria (connective tissue which underlies mucous membrane)
capillaries in lamina propria (lacking in epithelium)
|4. (slide 5) Stratified squamous epithelium,(VE:17)
dog esophagus. This tissue is especially resistant to friction. Note
mucous alveoli of the esophageal glands.
Here is a labeled view of stratified squamous epithelium.
basal cells (brownish cells along basement membrane where mitosis occurs)
squamous cells being shed (superficially, include nucleated surface cells)
|5. (slide 6) Pseudostratified ciliated columnar
c.s. of trachea , (try slide 11 if the detail is poor) (VE:15) This
is especially prominent in the respiratory tree.
Here is a labeled view of pseudostratified columnar epithelium.
numerous nuclei in deeper half of the tissue
cilia (contrast with brush border for appearance & function)
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