| Term 
 | Definition 
 
        | Epithelia, Connective Tissues, Muscle Tissue, Neural Tissue |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | A sheet of cells that covers an exposed surface or lines an internal cavity or passageway. |  | 
        |  | 
        
        | Term 
 
        | 6 important characteristics of epithelia |  | Definition 
 
        | Cellularity, Polarity (apical and basal surfaces produce uneven distribution), Attachment (basal surface bound to basal lamina), Avascularity (no blood vessels), Arranged into sheets or layers, Regeneration |  | 
        |  | 
        
        | Term 
 
        | 4 Functions of Epithelial Tissue |  | Definition 
 
        | Provide physical protection, Control permeability, Provide sensation, Produce specialized secretions |  | 
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