Absorption in the Stomach
Stomach is not the
site for absorption however some absorption of certain small molecules occur in
the stomach through its lining. This includes- water, some medicines, ethyl
alcohol, amino acids and caffeine.
Absorption
in the Small Intestine
Absorption from the small intestine each day
consists of several hundred grams of carbohydrates, 100 or more grams of fat,
50 to 100 grams of amino acids, 50 to 100 grams of ions, and 7 to 8 liters of
water. The absorptive capacity of the normal small intestine is far greater
than this: as much as several kilograms of carbohydrates per day, 500 grams of
fat per day, 500 to 700 grams of proteins per day, and 20 or more liters of
water per day. The large intestine can absorb still additional water and ions,
although very few nutrients.
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