Monogastric Digestive System: Pig
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• Digestion starts in the mouth
• Tongue • Teeth • Salivary Amylase: enzyme useful for digestion starting in mouth. Enzymatic digestion
• Esophagus
• Tube like structure • Peristaltic movement: Esophagus pushes food down in the stomach
• Stomach
• Very muscular • pH in the stomach is acidic (1-2)
• Stomach: What are the functions
• Storage of ingested food • Physical breakdown of feed • Secretes digestive juices
• Stomach: What are the regions?
• Esophageal • Cardiac: mucus for stomach lining • Fundic: HCL, Pepsinogen • Pyloric region: Mucus, enzymes
• Small Intestine structures
• Duodenum • Jejunum • Illeum • Villi
• Small Intestine: What is the function of the duodenum?
• Receives secretions from the pancreas: pancreatic juices containing enzymes • Receives secretions from the Liver: bile stored in gall bladder. Bile salts are for emulsification of fats • **Active site of digestion
• Small Intestine: What is the function of the jejunum?
• **Active site of nutrient absorption
• Small Intestine: What is the function of the Illeum?
• Nutrient absorption
• Small Intestine: What is the function of villi?
• Line intestinal wall • Increase absorption capacity of the small intestine • pH in small intestine is alkaline (6-7) • One things that DECREASES absorption is the ability of the animal to digest the feed in the duodenum • Another thin INCREASING the rate of passage: grinding feed too fine
• Large Intestine structures
• Cecum • Colon • Rectum • Anus
• Large Intestine Functions
• Stores undigested food • Bacterial fermentation: stink • Very little nutrient absorption • Some water absorption • Mineral absorption