Question 40 Write true (T) or false (F) (a) Epithelial tissue is a protective tissue in animal body. (b) The lining of blood vessels, lung alveoli and kidney tubules are all made up of epithelial tissue. (c) Epithelial cells have a lot of intercellular spaces. (d) Epithelial layer is a permeable layer. (e) Epithelial layer does not allow regulation of materials between body and external environment.