Epithelial tissue

 

Epithelial tissue covers the whole surface of the body as well as internal body surfaces. Epithelium can be divided into two groups: simple or stratified. Simple is one cell thick, stratified is two or more. Epithelial tissue has multiple functions, these include: protection, sensation, secretion, absorption in the intestines, excretion of sweat, diffusion in the lungs, cleaning the airways, and reducing friction in blood vessels.

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