Epithelial and Endothelial Difference in the Position
Epithelium, made of epithelial cells, not only covers the outer body surface but also the outer surface of all internal organs such, as the liver, stomach, intestine, lung, urethra, bladder and so on.
Read more:- https://kosheeka.com/epithelial-and-endothelial-cells-how-do-they-differ/