We are biology. We are reminded of this at the beginning and the end, at birth and at death. In between we do what we can to forget.

Mary Roach

Mots clés science life biology death mary-roach

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…he was doing a breath hydrogen test. If you know the amount of hydrogen someone is exhaling orally, it's a simple matter to extrapolate the amount they're exhaling rectally. This is because a fixed percentage of hydrogen produced in the colon is absorbed into the blood and, and when it reaches the lungs, exhaled. The breath hydrogen test has given flatus researchers a simple, consistent measure of gas production that does not require the subject to fart into a balloon.

Mary Roach

Mots clés blood colon hydrogen gas flatulence mary-roach absorb extrapolate gulp

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