Epithelial Tissue

Epithelial Tissue - Epithelial Tissue

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Epithelial Tissue Epithelial tissue,  or epithelium, has the following general characteristics:  Epithelium consists of closely packed, flattened cells that make up the inside or outside  lining of body areas. There is little intercellular material. The tissue is  avascular,  meaning without blood vessels. Nutrient and waste  exchange occurs through neighboring connective tissues by diffusion.  The upper surface of epithelium is free, or exposed to the outside of the body or to an  internal body cavity. The basal surface rests on connective tissue. A thin, extracellular layer  called the  basement membrane  forms between the epithelial and connective tissue.  There are two kinds of epithelial tissues:  Covering and lining epithelium covers the outside surfaces of the body and lines  internal organs. Glandular epithelium secretes hormones or other products.
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Epithelial Tissue - Epithelial Tissue

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