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23 Cards in this Set
- Front
- Back
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Epithelial cells originates from ? |
Ectoderm, endoderm, mesoderm |
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Ectodermal origin? |
- skin (epidermis) - oral cavity & anus - chornea & lens
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Mesodermal origin? |
- endothelium - mesothelium |
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Endodermal origin? |
- Respiratory system - Digestive tract (ex. oral cavity & anus) - Liver, gallbladder, pancreas, thyroid and parathyroid glands.
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Endothelium -Is: -Originates from: |
- Is: simple squamous epithelium lining blood vessels. - mesodermal origin |
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Mesothelium - Is: - Origin: |
- Is: simple squamous epithelium lining thoracic, abdominal and pericardial cavity. - mesodermal origin |
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Origin of Mesothelium and Endothelium ? |
- mesodermal origin |
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origin of anus? |
- Ectodermal origin |
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Origin of pleura? |
- mesodermal origin (mesothelium) |
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origin of lens?
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- ectodermal origin |
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origin of liver? |
- Endodermal origin |
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What is microvilli? |
Close packed, projections of cytoplasm. |
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Function of microvilli? |
increase the absorption surface. |
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Location of microvilli? |
- small intestine - prox. renal tubules |
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What is present on the surface of the microvilli? |
- glycocalyx (suger coat) |
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How is the surface of small intestine? |
- striated border |
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How is the surface of the proximal renal tubules?
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- brush border |
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Microvilli is composed of? |
bundle of actin filament, crose linked to each other by fimbrin. |
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What cross links the actin filaments of microvilli to each other? |
- fimbrins |
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What are longer microvilli called? |
- Stereocilia |
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What is Stereosilia? |
- longer microvili |
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Where are stereocilia located? |
- epididymis - ductus deferens - receptor hair cells of ear. |
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What is function of stereocilia ? |
facilitate movement of molecules into and out of the cell. |
