One of the things we ingest when we eat food or drink
liquid is gas. Drinking a carbonated beverage, for example, such as soda or beer,
ingests gas into the stomach. Given that the density of that gas is lighter than the
liquid and the solid we have also ingested, it tends to rise towards the top of the
stomach, just below the entrance to the esophagus. We can sometimes feel that pressure
after a beverage or meal, and a burp, or belch, is one way in which that gas escapes our
bodies.
Also, the digestive process that starts when we eat
or drink creates gas sometimes as the food is broken down, adding to the pressure in our
stomachs and the tendency to burp.
You'll be glad to know
that in some societies, like in parts of Eastern Europe, it is considered a great
compliment to burp loudly after a meal.
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