JOHN L. KANTOR, M.D.; JEROME A. MARKS, M.D.
Normally gas is present in the intestine in small amounts, insufficient to cause annoyance. It is readily passed, chiefly with the bowel movements, and is for the most part, odorless. The origin of this gas is two-fold, from the atmospheric air, and from food-stuffs.
Atmospheric air is swallowed during eating, and especially while drinking. By far the greater part of the ingested air is quickly belched. What little is left in the stomach assumes significance because it is composed of 80% nitrogen which is practically unabsorbable by the body and 20% oxygen which
KANTOR JL, MARKS JA. A Study of Intestinal Flatulence(A Study of Intestinal Flatulence*). Ann Intern Med. 1929;3:403–422. doi: 10.7326/0003-4819-3-5-403
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Published: Ann Intern Med. 1929;3(5):403-422.
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