Basic Biology question - why can I breathe through only my nose even when my mouth is open?

Basic Biology question - why can I breathe through only my nose even when my mouth is open?
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1 Answer

Answer :

Look at this diagram. What you’re describing is what happens when you use the rear portion of your tongue (the large hump in the diagram) to block that gap between the area marked “epiglottis” and the area marked “tonsils”. This effectively seals off the mouth’s gateway to the respiratory tract.
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