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QUESTION
Q18) The structure which prevents the entry of food into respiratory tract is... [ CPMT 1991 ]

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The function of the epiglottis is that it allows air to pass through the larynx and into the rest of the respiratory system. When swallowing food or drink, it covers the entrance to the larynx to prevent food and drink from entering the trachea (windpipe).
Answer : (c)