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AND CONNECTIVE TISSUES ©David B. Fankhauser, Ph.D., Professor of Biology and Chemistry University of Cincinnati Clermont College, Batavia OH 45103 |
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24 April 1989, rvsd 3 June '94, 26 Mar '95, 19 Mar 1996, 28 Mar '98, 28 Apr 99, 27 Mar 00, 3 May 01 |
The following photographs were taken by David Fankhauser using the Olympus C-3000 digital camera through the ocular of a microscopes. The views are from slides in a set that belongs to our Anatomy and Physiology course. If handled with care, and replaced carefully in their appropriate slots, these slides can be used for years.
Illustrate the tissue structure in the indicated slides at 400x power, no smaller than ½ page each. Make the cells large enough so that they clearly demonstrate the differences between the various tissues. Include and label the features which are listed for each slide. See your biology text book or any A&P text for more information.
For more indepth illustrations and discussion see my page on Epithelial Tissues , and my page on Connective Tissues .
EPITHELIAL TISSUES:
These tissues cover or line organs. They can
be glandular. They are all attached to a basement membrane, and many
have specialized surfaces. They have an intrinsically high mitotic
rate and are prone to forming malignancies (carcinomas).
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Slide 2. Simple Squamous (top view of peritoneum, a mesothelial
abdominal tissue)
cell boundaries edge of cell membrane
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Slide 3. Simple Cuboid (cross section, from kidney, tubule
lining)
basement membrane found on all epithelial tissues, bonds them to underlying
tissue
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Slide 4. Simple Columnar (lining of Nectaris [a
newt] intestine)
The four layers of the gastrointestinal tract, 40x Outer to inner: serosa muscularis externa submucosa mucosa villi |
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Detail of villus, 100x
basement membrane goblet cells in epithelial layer, they make mucous microvilli dramatically increase surface area, speeding up absorption chromatin stained genetic material within nucleus lamina propria connective tissue which underlies all mucous membrane |
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Detail of epithelium with goblet cell, 400x
basement membrane goblet cells in epithelial layer, they make mucous microvilli dramatically increase surface area, speeding up absorption chromatin stained genetic material within nucleus |
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Slide 5. Esophagus, 40x (dog )
stratified squamous epithelium
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Stratified squamous epithelium, 400x (lining of
dog esophagus)
flaking off squamous cells strata of flattening cells stratum basale cells adhered directly to the basement membrane basement membrane lamina propria below |
CONNECTIVE TISSUES:
Connective tissues have a relatively few cells embedded
in intercellular material (matrix). Matrix consists of protein
(often collagen) fibers imbedded in ground substance. Because connective
tissue often requires repair, it can also give rise to malignancies, called
sarcomas.
