Many of the symptoms of vitamin A deficiency, such as blindness and an increase in respiratory infections, are related to the role of vitamin A in _____.

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Vitamin A is necessary for the maintenance of epithelial cells, which line various surfaces of the body including the respiratory tract and eyes. Deficiency in vitamin A can result in a weakened barrier against infection and an increased risk of respiratory infections and blindness.

Many of the Symptoms of Vitamin a Deficiency, Such as Blindness