question_answer 65)

  Write true (T) or false (F) (a) Epithelial tissue is 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 permeable layer. (e) Epithelial layer does not allow regulation of materials between body and external environment.

Answer:

  (a) True                                (b) True                                (c) False                               (d) False        (e) True Epithelial tissue in the protective layer of cells, which covers the surface of body and lines the internal organs. It is present as lining of blood vessels (squamous epithelial tissue), lung alveoli and kidney tubules (columnar ciliated epithelial tissue). These cells are closely packed together and regulate the movement of materials between body and external environment.