What causes farts?

Answer 1

It is a normal phenomena. Food is digested in the bowels and during this process food is broken down by the enzymes. This produces some gas as a by product which is passed out. Certain foods are responsible like pulses, peas and beans which can cause excessive gas.

Answer 2

Flatulence (a fart) is also called passing gas, which is what is happening. Gas inside your digestive system has to come out of one end or the other, and will either be a belch or a fart. As you eat, drink, and talk, you swallow some air. Also, gas builds up when your stomach acid dissolves different food and reacts chemicals in the stomach lining. The gas either goes back up the esophagus and out your mouth (a belch) or goes further down the intestines to the anus (a fart). Gas also forms when bacteria inside your intestines feed on undigested food and form various chemicals when they do. The gas either goes back up the esophagus and out your mouth (a belch) or goes further down the intestines and out the anus (a fart).

Flatulence can be caused by the consumption of Carbonated Beverages, and from incompletely digested lactose.

The bad smellThe activity of bacteria in the bowels produces various gases and these have to leave the body. Most expelled gas is nitrogen, and only a small part is methane. The bad smell comes from hydrogen sulfide, mercaptan, and other sulfur compounds.

(see related question)

Answer 3

Farts are caused by the production of gas in the intestines during the digestion process. This gas is a combination of swallowed air and gases produced by bacteria breaking down food in the intestines. The body expels this gas through the rectum as flatulence.