The Pharynx and the Esophagus

         When the food is swallowed, it slips down the throat and passes through the pharynx. There are two passages leading out from the pharynx; one is the esophagus which is the passage for the food and the other is the windpipe which is the passage for the air. The muscles of the pharynx move the food to the esophagus. This is a tube leading from the throat to the stomach. The esophagus is about 25 cm. long.



           When you swallow, the opening to your windpipe closes. If you talk while you swallow, the food may get into the windpipe. This will cause you to choke and cough until the food particle gets out from your windpipe.

            The muscles of the esophagus move the food toward the stomach. This squeezing movement of muscles is called peristalsis.

            What is peristalsis movement like?

            The movement of the toothpaste from its tube is similar to what happens to the food in your esophagus. The food is forced into the stomach by peristalsis. 

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