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10 Cards in this Set
- Front
- Back
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How many cell types do humans have ? |
200 |
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What is epithelial tissue ? |
Sheet of cell ms that covers an exposed surface or lines an internal cavity or paaaageway includes glands |
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What are the 6 characteristics of epithelia? |
1. Cellularity 2. Polarity 3. Attatchment 4. Avascularity |
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What are the 6 characteristics of epithelia? |
1. Cellularity 2. Polarity 3. Attachment 4. Avascularity 5. Arranged into sheets or layers 6.Regeneration |
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What is the function of epithelial tissue |
1. Provide protection 2.control permeability 3 provide sensation 4. Produce specialized secretions |
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Specialized epithelial cell structure |
Microvilli Sterocilia Ciliated epithelium
Located apically ( outside) Basal = inside |
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Maintaining the integrity of the epithelium |
▪️Intercellular connection ▪️Attatchment to the basal lamina( too- clear and bottom- dense layer ) ▪️Epithelial maintNance and renewal is self- perpetuated ( stem cells |
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Classification of epithelia |
▪️Simple epithelium ▪️Statified epithelium - squamous - cuboid Transitional - columnar |
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Simple squamous |
Function: reduce friction , controls vessel permeability , performs absorption and secretion
Location: endothelial lining of heart and blood vessels , alveoli of lungs |
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Stratified squamous |
Function: privies physical protection, against abrasion , pathogens , and chemical attack
Location: surface of skin , lining of mouth throat , esophagus , rectum , Anus , and vaginA |
