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Download Cattle Digestion - CHS Science Department Mrs. Davis
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CATTLE DIGESTION Animal Science Cattle Unit RECALL EQUINE DIGESTION… • Monogastric 1. Mouth • Teeth chew to break down food • Saliva breaks down starch 2. Esophagus • Tube that carries food from mouth to stomach 3. Stomach • Chemicals added to food to bread down further • Smaller materials are absorbed into the bloodstream 4. Small Intestine • Absorbs nutrients • Enzymes help break down food further 5. Cecum • Has little function • Between small and large intestines 6. Large Intestine • Main function is to absorb water 7. Rectum • The terminal portion of the large intestine • Leads to the anus where waste is passed to the outside of the body RUMINANTS—FOUR CHAMBERED STOMACHS • One stomach • • Used for the digestion of mass quantities of roughages • • Four compartments Hay and grasses The path is the same • Mouth • Esophagus • Stomach • Small intestine • Cecum • Large intestine • Rectum RUMINANT MOUTH • Functions the same as monogastric EXCEPT… 1. Ruminants regurgitate their food and re-chew it 2. A cow makes 40,000-60,000 jaw movements a day just from chewing RUMINANT ESOPHAGUS • Functions the same as monogastric EXCEPT… • There is a valve that allows animals to regurgitate feed stuffs to be chewed separately • How well could you digest these? • What happens to you when you eat corn? RUMINANT STOMACH • Functions the same as monogastric EXCEPT… • There are 4 chambers • Rumen • Reticulum • Omasum • Abomasum CHAMBER #1: THE RUMEN • Acts as a large fermentation vat • Using microbes to do fermentation • Movement of the rumen mixes its content • Finds large particles and regurgitates them CHAMBER #2: THE RETICULUM • Considered an extra piece of the rumen • Has a honeycomb shape • Site of hardware collection • Cattle may ingest metal from the feed/ground • Cow magnets help the metal from going any further Cow Magnet CHAMBER #3: THE OMASUM • Aids in water absorption • Numerous folds help to trap digestive particles • Increases the time spent to be absorbed CHAMBER #4: THE ABOMASUM • Considered the “true stomach” • Functions the same as the monogastric stomach • Hydrochloric acid helps break down the material http://www.cteonline.org/portal/default/Curriculum/Viewer/Curriculum?action=2&cmo bjid=178382&view=viewer&refcmobjid=197387 ERUCTATION (BELCHING) • Production of Carbon Dioxide and Methane • Produced by microbial population in the rumen • Rumen will contract and force the gas out • Bloating can result if ruminant does not belch Bloat and Trocar Flipped Stomach and Gas CATTLE PARTS CIRCLE THE FOLLOWING PARTS • • • • • • • Poll Dewlap Brisket Hoof Dew Claw Hock Switch • Flank (rear pictured) • Back • Loin • Hooks • Rump • Round • Rib • Belly • Heart Girth LABEL THE PICTURE WITH THE PARTS MEAT CUTS Meat Cut/Quality Video
