Flatulence

related topics
{disease, patient, cell}
{food, make, wine}
{acid, form, water}
{company, market, business}
{law, state, case}
{government, party, election}
{rate, high, increase}
{film, series, show}

Flatulence is the expulsion through the rectum of a mixture of gases that are byproducts of the digestion process of mammals and other animals. The mixture of gases is known as flatus in medical speak, informally as a fart, or simply (in American English) gas, and is expelled from the rectum in a process colloquially referred to as "passing gas", "breaking wind" or "farting". Flatus is brought to the rectum by the same peristaltic process which causes feces to descend from the large intestine. The noises commonly associated with flatulence are caused by the vibration of the anal sphincter, and occasionally by the closed buttocks.

Contents

Composition of flatus

Nitrogen, the main constituent of air, is the primary gas released during flatulence, along with carbon dioxide, which is present in higher quantities in those who drink carbonated beverages regularly. The lesser component gases methane and hydrogen are flammable, and so flatus containing adequate amounts of these, can be ignited. However, not all humans produce flatus that contains methane. For example, in one study of the feces of nine adults, only five of the samples contained archaea capable of producing methane.[1] Similar results are found in samples of gas obtained from within the rectum.

Full article ▸

related documents
Bile
Ketosis
Salicylic acid
Nitrogen narcosis
Datura stramonium
Guar gum
Tryptophan
Geophagy
Coenzyme Q10
Red Bull
Capsaicin
Taurine
Red blood cell
Excretory system
Escherichia coli O157:H7
Virology
Large intestine
Catecholamines
Sarin
Oncogene
RNA interference
Central obesity
Alkaptonuria
Sildenafil
Biofilm
Penicillin
Anandamide
Corticosteroid
Salvinorin A
Diabetic ketoacidosis