You can’t run away

Explanation for flatulence

Flatus is expelled under pressure through the anus, whereby, as a result of the voluntary or involuntary tensing of the anal sphincter, the rapid evacuation of gases from the lower intestine occurs. Depending upon the relative state of the sphincter (relaxed/tense) and the positions of the buttocks, this often results in an audible crackling or trumpeting sound, but gas can also be passed quietly. The olfactory components of flatulence include skatole, indole, and sulfurous compounds.[1] The non-odorous gases are mainly nitrogen (ingested), carbon dioxide (produced by aerobic microbes or ingested), and hydrogen (produced by some microbes and consumed by others), as well as lesser amounts of oxygen (ingested) and methane (produced by anaerobic microbes).[2] Odors result from trace amounts of other components. Read more.

屁的来源

组成屁的气体主要来源于两个部分：一是咀嚼时吞入消化道的气体；二是由大肠和直肠内的细菌，特别是大肠杆菌，发酵食物残渣时产生的气体。 阅读更多有关资料。

TechTags Plugin [ flatulence | infrared | 屁 ]

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This entry was posted by KJ Lim on Friday, August 10th, 2007 at 11:33 am and is filed under Funny. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.