Why is our stomach growling?

In order to mix the food in the stomach and also to keep the gastrointestinal tract in a certain way "clean", it is almost constantly on the move. This happens through regular wave-like muscle contractions - the so-called peristalsis.

That's how stomach growls

If we have not eaten for a long time, the stomach is not completely empty, but still filled with water and gastric acid. Peristalsis is still active.

Since the now very fluid stomach contents mixed with air, the cavity acts as a sounding body: The stomach begins to grumble and growl.

The sounds can continue even after eating. Because, of course, the stomach walls work well because they get something to do - but usually it runs a bit quieter.

Sources used:

spektrum.de: Peristalsis


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