6 basic processes of digestion
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2. Mechanical processing
(examples): teeth physically cut, tear and grind food into smaller pieces; stomach churns and mixes ingested food.
5. Absorption
Movement of micronutrients, including water and vitamins, into blood or lymph vessels for distribution to cells.
6. Excretion (defecation)
Removal of waste products and elimination of indigestible substances from the GI tract.
4. Secretion
cells in the GI tract and accessory glandular organs secrete water, enzymes, acids, buffers, and salts.
3. Digestion
chemical breakdown of food into small organic molecules suitable for absorption in GI tract. eg. Starch >>>>>>> Simple sugars; Protein >>>>>>> Amino Acids.
1. Ingestion
taking food into the mouth.
