00 - DIGESTION ANSC 221 Excellent Reference •...

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Unformatted text preview: DIGESTION ANSC 221 Excellent Reference • http://arbl.cvmbs.colostate.edu/hbooks/ pathphys/digestion/index.html » just start at: • http://arbl.cvmbs.colostate.edu/hbooks/ Definition • Digestion is all of the chemical and physical changes that food undergoes to be absorbed. • Absorption takes place as nutrients enter the body from the digestive tract. GI Tract – Digestive System • Mouth • Esophagus • Stomach • Small intestine • Large intestine • Liver, • gall bladder • pancreas Monogastric (nonruminant) MOUTH • Lips • Teeth • Tongue • Salivary glands LIPS • Prehension – What species are lips most important? – Least important? • Mastication (teeth) • Swallowing (tongue) Teeth carnivores Dog Herbivore teeth Mastication • Number of jaw movements significant – Can have effect on HCO 3 production – Affects rumen fermentation Horse Secretions from the mouth • Saliva – Mucin – Salivary amylase • (called ptyalin in human) • Bicarbonate in ruminants Esophagus • Birds – CROP • Mammals Stomach • Complexity varies – Simple in monogastrics (nonruminants) – 4-chambered complex stomach of ruminant Functions of Stomach • STORAGE • Chemical Digestion Non-Ruminant Stomach • 4 regions – Esophageal – Cardiac – Fundic – Pyloric Poultry...
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This note was uploaded on 02/09/2010 for the course ANSC 221 taught by Professor Staff during the Spring '08 term at Purdue.

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00 - DIGESTION ANSC 221 Excellent Reference •...

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