Define the term epithelial tissues

Question

Define the term epithelial tissues? What is their general function and how is that function related to the characteristics of the tissue?

Answer 1

Epithelial tissues, also termed as epithelia, are tissues specialized in the wrapping of internal and external surfaces of the body. The general function of epithelium is to give protection and impermeability (or selective permeability) to covered structure. It justifies the epithelium's usual features: the cellular juxtaposition forming layers of much proximate cells with diminished or none intercellular space among each two neighbor cells.