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Epithelial Tissue
Characteristics of Epithelial Tissue:
Cellularity- composed almost entirely of closely packed cells so that there is little extracellular material between them
Specialized contacts- cells fit close together to form sheets and adjacent cells are bound together at many points
Polarity- epithelial cells have an apical surface at the top and a basal surface in the lower region that differ from those at the top causing them to be polar.
Supported by connective tissue- they rest upon connective tissue that helps them resist stretching and tearing.
Avascular but innervated- they are supported by nerve fibers but contain no blood vessels.
Regeneration- as long as they receive adequate nourishment they can rapidly replace lost cells through cell division
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