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Swallowing is a complicated muscular process. Your tongue forces food to the back of your mouth and into the throat. At the same time the soft part of the roof of your mouth closes off the air passages to your nose and a small flap called the epiglottis closes off the passage to your lungs so you do not inhale the food.
You can actually swallow upside down because the food is carried along the digestive system by muscular waves. Astronauts are able to swallow when there is no gravity to help
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Tags: food,
muscles,
stomach,
tongue
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