Functions of Epithelium

Epithelium is one of the four basic types of animal tissue, along with connective tissue, muscle tissue and nervous tissue. It refers to layers of cells that line hollow organs and glands. It is also those cells that make up the outer surface of the body. The cells vary in structure according to their function, which may be protective, secretory, or absorptive. Just remember the mnemonic PASSIFS for its functions.


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