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Meanwhile, the surface of the small intestine absorbs anything that our enzymes have broken down into sufficiently small components—usually individual amino acids, simple sugars, and free fatty acids.Finally our ileocecal valve opens, and our small intestine releases what’s left into our large intestine— And the reason we have a bacterial colony in our colon is because our own enzymes can’t break down everything we eat.I know I really should have ended this article at the punchlines, but I’ve got more to say. (And before we go any farther, I am not arguing that we should never eat vegetables: I’m just busting a silly myth.) First, I’ll footnote the essay above with these references. Bacterial concentrations in this region are 10(2)-10(5) cfu/ml intestinal content. Significance of microflora in proteolysis in the colon. “Proteolytic activity was significantly greater than (P less than 0.001) in small intestinal effluent than in feces (319 /- 45 and 11 /- 6 mg of azocasein hydrolyzed per h per g, respectively).” and that doesn’t count what already occurred in the stomach.
(And, often, a substantial quantity of farts.) The remaining indigestible plant matter (“fiber”), dead gut bacteria, and other waste emerge as feces.(Keep in mind that we have not absorbed any nutrients yet: we’re still breaking everything down.) Eventually our pyloric valve opens, and our stomach releases the chyme, bit by bit, into our small intestine—where a collection of salts and enzymes goes to work.Bile emulsifies fats and helps neutralize stomach acid; lipase breaks down fats; trypsin and chymotrypsin break down proteins; and enzymes like amylase, maltase, sucrase, and (in the lactose-tolerant) lactase break down starches and some sugars.In the stomach, pepsin (another enzyme) breaks down proteins, and strong hydrochloric acid (p H 1.5-3, average of 2…this is why it stings when you vomit) further dissolves everything.The resulting acidic slurry is called ‘chyme’—and right away we can see that the “meat rots in your stomach” theory is baloney.
And rabbits run their food through twice: they in order to get more food value out of the plant matter they eat.