The surface of my hand is an example of epithelial tissue. Epithelial tissue covers the whole surface of the body and lines the internal organs. Epithelial cells are tightly packed with almost no intercellular space and substance. There are a few kinds of epithelial tissue but regardless of the kind epithelial tissue is usually separated from the underlying tissue by a layer of connective tissue. The connective tissue is is used to provide structural support for the epithelium and bind it to other structures. Epithelial tissue is also one of four basic animal tissues, the others are connective tissue, muscle tissue, and nervous tissue.
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