Respuesta :
All epithelia have two surfaces, an apical surface, and a basal surface, that differ in both structure and function. This property is called polarity.
Yes it is true. Tissues are the group of cells present in the body which are present very near to each other and they are organized in different shapes and forms of different sizes to perform different functions and to make up the organ system of the body and the tissues can be specific in their function or one tissue can perform many functions as well and there are mainly 4 types of tissues.
Which are epithelial ,connective, muscle, and nervous tissue and epithelial cells among them are the ones to be present both inside and outside of the body and they mainly function to protect the skin layering and also to line up the skin blood vessels, urinary tract and other organs so they also work for the contraction and relaxation of the tissues as they are lined up in urethra , uterus and urinary tract and epithelial cells have two surfaces the upper one is called as the apical surface and the lower one is called as the basal surface and as they are fond in different position and involved in different function this phenomenan is called as polarity so yes this is true.
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