Overview: Digestion and Absorption NFSC 303 McCafferty.
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Overview: Digestion and Absorption NFSC 303 McCafferty
Digestion & Absorption: Overview Digestion: breakdown of nutrients in the GI tract –Mechanical and chemical Absorption: transfer of nutrients through the wall of the GI tract, into circulation Involved in D&A –GI tract –Auxiliary organs: ________________________________
Stomach –Mechanical “churning” and peristalsis –Chemical: water enzymes HCl = – –
Semi-liquid _______________ –Released into small intestine in small amounts
Small Intestine –Most digestion and absorption occur here –Peristalsis and Segmentation chyme mixed with more enzymes bicarbonate (to reduce acidity), and bile (involved in fat absorption) “Lower” small intestine: – –
Large Intestine (Colon): –Removes excess water and salts (electrolytes), forms feces. Rectum and Anus: –Feces is held in rectum until eliminated through the anus.
Now we have all the nutrients on the inside of the body. –In the next section, we’ll learn all about 1)carbohydrates, 2) digestion and absorption of CHO, and 3) utilization of CHO once inside the body.