Epithelium Tissue
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| show | Function:
1. passage of materials by diffusion/filtration
2. secretes lubricating substances in serosae
Location:
1. renal corpuscles
2. alveoli of lungs
3. lining of heart, blood, lymphatic vessels
4. lining of ventral body cavity (s
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| Simple Columnar Epithelium | show 🗑
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| Simple Cuboidal Epithelium | show 🗑
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| Pseudostratified Columnar Epithelium | show 🗑
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| Stratified Squamous Epithelium | show 🗑
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| show | Function:
1. protection
Location:
1. Ducts of: mammary glands, salivary glands, largest sweat glands
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| Stratified Columnar Epithelium | show 🗑
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| show | Function:
1. permits distention of urinary organs by contained urine
Location:
1. epithelium of urinary bladder
2. ureters
3. proximal urethra
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| show | Ductless glands that secrete directly into surrounding tissue fluid and blood
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| show | The products (sweat, mucus, oil, etc.) travel in ducts to epithelial surface
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| show | - Produce mucin: mucin + water --> mucus
- unicellular exocrine gland
- protect and lubricate many body surfaces
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| Multicellular exocrine glands | show 🗑
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| Tight junctions | show 🗑
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| show | - just below tight junctions in epithelial tissue
- transmembrane linker proteins attach to actin microfilaments of cytoskeleton and bind adjacent cells
- reinforce the tight junctions
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| Desmosomes | show 🗑
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| show | - passageway between 2 adjacent cells
- let small molecules move directly between neighboring cells
- cells are connected by hollow cylinders of protein
- function in intercellular communication
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| show | - non-cellular supporting sheet between epithelium and underlying CT
- made up of proteins secreted by epithelial cells
- acts as selective filter
- acts as scaffolding along which regenerating epithelial cells can migrate
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| show | - fingerlike extensions of plasma membrane of apical epithelial cells
- occurs in almost every moist epithelium of the body
- maximized surface area across which small molecules enter and leave
- act as stiff knobs to resist abrasion
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| Cilia | show 🗑
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| show | - very long, single cilium
- only human cells with these are sperm cells
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Created by:
peckman12
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