2. 1 What type of system is this?

3. Created by: Arlene Barrett, Dennis Bratton, Mariah Gumphry, Haley Vrazel 2

4. Objectives Evaluate animals that are monogastric. Analyze the components of a monogastric stomach. Interpret the parts and functions of monogastric digestive system Analyze the enzymes in a monogastic. 3

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6. 8/1/20155 Digestion is the process by which large, complex nutrient molecules are broken down into simpler molecules capable of being used by the organism for food.

7. 8/1/20156 Humans, swine, rabbits, chickens and horses all have a simple stomach, which is also known as a monogastric digestive system.

8. Monogastric Carnivores and omnivores have monogastric digestive systems. Monogastric systems have a simple stomach structure and only one compartment. Some animals with monogastric digestive systems are pigs and rabbits. Humans also have monogastric digestive systems. 7

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10. Monogastric Stomach Split into 4 parts: Esophageal Non-glandular Connects the stomach to the esophagus Cardiac Mucus secretion starts here Fundic Body of the stomach Digestion and churning takes place here Mucus secretion Pyloric Connects to small intestines Mucus secretion

11. Monogastric Stomach The monogastric stomach is very acidic pH drops to 2.0-3.5 Amylase quits working due to low pH Has a mucus lining to protect the stomach from digesting itself Made of smooth muscle to aid in constant churning/mixing

12. Monogastric stomach cont. HCl is produced, denatures proteins and prepares them to be broken down Pepsinogen is the inactive form of Pepsin Pepsin, activated form of Pepsinogen, activated by HCl Pepsin breaks down and digests the denatured protein

13. 12 Parts and functions of the monogastric mammal digestive system continued… Small Intestine -enzymatic digestion and absorption -Functions of the small intestine: digestion of proteins, carbohydrates, and fats; absorption of the end products of digestion 1. duodenum - most digestion occurs here 2. jejunum - some digestion and some absorption occur 3. ileum - mostly absorption - Bile - made in liver, stored in gall bladder, active in the small intestine, emulsifies fat to aid in digestion

14. 13 Parts and functions of the monogastric mammal digestive system continued… Cecum - essentially non-functioning in many monogastrics. Rabbits and horses have an enlarged cecum that acts like a rumen and is involved with microbial digestion (fermentation) Large Intestine -bacterial activity -water absorption -waste storage

15. 14 Parts and functions of the monogastric mammal digestive system continued… Enzymes in the small intestine

16. Video Horse’s Digestive System http://www.youtube.com/watch?v=8lqk7igz9L4&feat ure=related http://www.youtube.com/watch?v=8lqk7igz9L4&feat ure=related 15

17. Review Evaluate animals that are monogastric. Analyze the components of a monogastric stomach. Interpret the parts and functions of monogastric digestive system Analyze the enzymes in a monogastic. 16

18. Resources Horse’s Digestive System http://www.youtube.com/watch?v=8lqk7igz9L4&feat ure=related Resources: Rakowitz-McMillian Sam Houston State University Animal Science Note Packet 17