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6 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Epithelium |
It forms the outer covering of the body and the lining of internal organs/cavities. |
Epi-upon, thelia-growing |
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Where is epithelium derived from? |
It can be derived from any of the three germinal layers - ectoderm, endoderm or mesoderm. |
Gem layers |
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How does epithelial tissues obtain nutrition? |
They are avascular and obtains nourishment from the underlying connective tissue by diffusion. |
Diffusion |
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Avascular |
Characterized by or associated with a lack of blood vessels. |
Lack of blood vessels |
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What does free surfaces of certain epithelial cells have? |
°Stereocilia-long and non-motile cilia like projections seen in reproductive ducts (epididymis), internal ear etc. °Microvilli-are microscopic cellular protrusions that increase the surface area of absorptive cells and minimize any increase in volume. |
Cilia |
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How many types of epithelial tissues are there? What are they? |
There are mainly 2 types of tissues A) Simple epithelium i) Simple squamous epithelium ii) Simple cuboidal epithelium iii) Simple columnar epithelium a) ciliated columnar epithelium b) Non-ciliated columnar epithelium B) Compound epithelium C) Glandular epithelium |
Simple and compound |
