Biology
Assertion (A): The entrance to the oesophagus is guarded by a flap called epiglottis.
Reason (R): Epiglottis closes the entrance of trachea at the time of swallowing food.
- A is True and R is False.
- A is False and R is True.
- Both A and R are True.
- Both A and R are False.
Respiratory System
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Answer
A is False and R is True.
Reason — The epiglottis does not guard the oesophagus. Instead, it guards the entrance to the trachea (windpipe). During swallowing, it closes the tracheal opening to prevent food from entering the windpipe.
The epiglottis covers the glottis (opening of the trachea) during swallowing to send food into the oesophagus.
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