Epithelial tissues are found on all the surfaces of the body; including external surfaces and surfaces of organs etc. Are there any surfaces which do not have epithelial? I have read in my book that almost all the surfaces has epithelial tissues but there are some exceptions. What are the exceptions?
Similarly, almost all the epithelial tissues are avascular. But there are some exceptions which are vascular? Which epithelial tissues are vascuar?
*I'm talking about a human body.