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Posted by / 16-Mar-2016 09:14

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Bacterial fermentation and digestion processes produce heat as a byproduct as well as various pungent gases.The resulting bubbles of gas tend to be small, hot, and concentrated with stinky bacterial metabolic products.

Sounds depend on the velocity of expulsion of the gas and the tightness of the sphincter muscles of the anus.

However, all methane in any farts comes from bacterial action and not from human cells.

The odor of farts comes from small amounts of hydrogen sulfide gas and mercaptans in the mixture. Nitrogen-rich compounds such as skatole and indole also add to the stench of farts.

) mundane with respect to odor, and don't feel particularly warm.

Another major source of fart gas is bacterial action.

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