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A look at the biological functions that produce burps and farts.Key facts
- Burps are caused when swallowed air forces open the stomach sphincter and travels up the oesophagus.
- Farts are caused when swallowed air travels down the digestive tract and mixes with other gases.
- In the large intestine, bacteria produce hydrogen sulphide, carbon dioxide and methane.
- Hydrogen sulphide is responsible for the smell released when you fart.
Transcript
Everyone burps and farts, but why?
They are both just gases escaping from our bodies.
When we eat or drink, we don't just swallow food or liquid, we also swallow air.
AIR
This air contains gases like nitrogen and oxygen.
Nitrogen
Oxygen
When we swallow a lot of these gases into the stomach, they need to ...
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