Q:

Why does your stomach growl?

A:

Quick Answer

Stomachs growl due to a process called peristalsis. Peristalsis is the means by which a person's digestive system moves food down from the stomach and through the intestines while it mixes solid food with digestive liquids.

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Full Answer

As a person digests solid food, muscle contractions help to move the food along the digestive tract while mixing it with the juices that help to break it down. Along the way, pockets of air can sometimes get trapped and moved, and as they are squeezed, these air pockets make the sounds interpreted as growling or rumbling. In addition, the stomach begins the process of peristalsis when it has already been emptied as a means to digest any remaining food that might have been missed and stimulate the nerves in the stomach that signal hunger.

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