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Introduction to the Digestive System

Digestive System. Large complex molecules broken down into simpler moleculesLong tube beginning with mouth and ending with the anus. Digestive Systems. Man and pig have a simple stomach with an extensive intestinal systemRuminants have a complex stomach with a simpler intestinal systemHorses and

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Introduction to the Digestive System

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    1. Introduction to the Digestive System

    2. Digestive System Large complex molecules broken down into simpler molecules Long tube beginning with mouth and ending with the anus

    3. Digestive Systems Man and pig have a simple stomach with an extensive intestinal system Ruminants have a complex stomach with a simpler intestinal system Horses and rabbits have a simple stomach with an extensive intestinal system and an enlarged cecum

    4. Digestive System Mouth: “Prehension” tool (grasps food) Salivary glands secrete juices containing enzymes (digest food) Chewing food breaks down Esophagus: muscular tube that connects mouth to stomach Peristaltic Movement: sequential contraction of ringlike muscles Reverse Peristalsis = vomiting

    5. Simple Stomach Muscular contractions break down food Enzymes break down food: Gastric: proteins Liver and pancreatic: fats

    6. 3 Major Digestive Systems All 3 systems will be addressed in detail in the lesson to follow: Ruminants—have four stomaches Monogastric—have one stomach Modified Monogastric—have one stomach but the ability to digest roughages

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