Why do living things fart?!

Well, for starters, the gas that makes up a fart comes from two sources: more originates from the breakdown of food by the digestive system, and some is from swallowed air. In the first case, foodstuffs are broken down by enzymes, stomach acids, and intestinal bacteria in order for the energy in them to be made available to the body.

Through the processes of digestion and fermentation, gases can be liberated from what's eaten. In the second case, air that a person swallows from eating, drinking, breathing, chewing gum, and being stressed, among other ways of entry, that's not expelled during a burp travels through the stomach and intestine, transforming into fart-ready mode.

In either case, the gases flow down through the rest of the digestive tract and eventually exit the body expelled as a fart, or farts.

http://www.goaskalice.columbia.edu/1909.…

we fart because of the gas chemicals from our food is released. if we never farted we would blow up seriously from all the gas chemicals in our body.

To excrete waste, which is in this case is gas.

to expel the gasses inside of us.