Burping

Burping, also known as belching, ructus or eructation, is the release of gas from the digestive tract (mainly esophagus and stomach) through the mouth. It is often audible.

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Burping is typically caused by eating or drinking too fast, and thereby swallowing (aerophagia) and subsequently expelling air, in which case the expelled gas is a mixture of nitrogen and oxygen. Burps can also be caused by imbibing carbonated drinks such as beer, soft drinks, or champagne, in which case the expelled gas is carbon dioxide from the drink itself. Gastroesophageal reflux disease can also cause involuntary burping. Some studies (http://in.news.yahoo.com/041026/139/2hica.html) have suggested that aerophagia is not the primary culprit but that burping is in fact a learned (social) behaviour.

Gas: :For other meanings see gas (disambiguation)....

Esophagus: The esophagus (also spelled oesophagus/?sophagus), or gullet is the muscular tube in vertebrates through which ingested food passes from the mouth area to the stomach. Food is passed through the esophagus by using the process of peristalsis. Specifically, in mammals, it connects the pharynx, which ...

Stomach: In anatomy, the stomach (in ancient Greek στόμαχος) is an organ in the alimentary canal used to digest food. Generally, the stomach's primary function is not the absorption of nutrients from digested food; this task is usually performed by the intestine....