Digestion may be defined as the preparation of food by the animal for absorption. As such, this may include mechanical reduction of particle size (grinding by pharyngeal teeth or gizzard), enzyme solubilization of organics, pH solubilization of inorganics, and emulsification of lipids. Absorption includes the various processes that allow ions and molecules to pass through membranes of the intestinal tract into the blood or lymph to be metabolized by the animal.
KeywordsGrass Carp Channel Catfish Keto Acid Apparent Digestibility Pharyngeal Tooth
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