1. VTS 150 Animal Nutrition Fall 2010 Instructor: Beth Alden, DVM

4. Resources on Library Reserve Small Animal Clinical Nutrition 4 th Edition, Hand,Thatcher, Remillard, Roudebush, The Mark Morris Institute, 2000

7. Digestive Classifications Two Methods of Digestive System Classification Food Source Stomach Type

11. Types of Digestive Systems Four compartment stomach: Reticulum, Rumen, Omasum & Abomasum (cows, sheep, goats) One “true” stomach (dogs, cats, pigs, horses) Ruminant Monogastric

25. The Ruminant Stomach © University of Bristol, 1988 Pillar Papillae Papillae

40. Chronology of Digestion : 2. Mechanical Grinding Down of Food Carnivore Teeth Pointed to facilitate holding and tearing of food © Clinical Textbook for Veterinary Technicians 6 th ed .; McCurnin, Bassert

41. Chronology of Digestion: 2. Mechanical Grinding Down of Food Herbivore Teeth Flat, occlusal surface for grinding

43. Chronology of Digestion: 2. Mechanical Grinding Down of Food Ruminant Teeth No upper incisors or upper canine teeth Dental Pad Thick connective tissue Diastema

44. Chronology of Digestion: 2. Mechanical Grinding Down of Food Positional Location of Teeth - Terminology Maxilla Upper Arcade Mandible Lower Arcade Lingual Inner side of lower arcade teeth that face tongue Labial Outer surface of upper and lower arcade teeth (faces lips) Palatal Inner side of upper arcade teeth (faces the palate) Buccal Outer side of teeth in back of mouth (faces the cheeks)

56. Chronology of Digestion 5. Elimination of Waste Material *Horses are different Colon Cecum “blind sac” Carnivores Simple, tubular, contracts to move feces through Poorly developed Herbivores* Large bacterial population (microbes) for fermentation More developed, larger than carnivore