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Main functions:
1. Protection
2. Absorption
3. Filtration
4. Excretion
5. Secretion
6. Sensory reception
1. Cellularity- close packed cells
2. Specialized contacts- form continuous sheets
3. Polarity-
- Apical surface: upper free surface
- Basal surface: lower surface
- Microvilli- ex. cilia
- Basal lamina: adjacent to basal surface, thin supporting sheet
4. Supported by connective tissue- all layers lay upon
5. Avascular but innervated- supplied by nerve fibers, contains no blood vessels
6. Regeneration- exposed to friction, cells rub off
Epithelial Tissue Characteristics