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Livestock Digestive Systems

Livestock Digestive Systems. Today we will…. Identify herbivores, carnivores and omnivores Discuss the pathway which food travels through the digestive system. Construct a monogastric tract. Differences. Different species of animals have different digestive systems due to the food they eat

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Livestock Digestive Systems

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  1. Livestock Digestive Systems

  2. Today we will… • Identify herbivores, carnivores and omnivores • Discuss the pathway which food travels through the digestive system. • Construct a monogastrictract.

  3. Differences • Different species of animals have different digestive systems due to the food they eat • These differences allow the animal to gain the most energy from its digested food • The 3 types discussed today are: • Omnivores • Carnivores • Herbivores

  4. Herbivores • Depend on plant material to survive, such as grass and leaves • Some examples of herbivores are: • Rabbits • Cattle • Deer • Sheep • Goats • Horses • Have a long and complex digestive system to break down plant matter.

  5. Carnivores • Depends on other animals as a food source • Digestive tract is short and simple due to only consuming meat • Some carnivores are: • Cats • Eagles • Mountain Lion • Snakes • Spiders

  6. Omnivores • Depend on both plant matter and other animals for food sources • Some examples of omnivores are: • Chickens • Pigs • Dogs • Bears • Humans

  7. What is the pathway for which food travels? • The path that most food travels (monogastric animals): • Mouth • Esophagus • Stomach • Small Intestine • Large Intestine • Rectum

  8. Lets get started • When eating the mouth works with your teeth and tongue to crush food while pushing it down the throat • While in the mouth the salivary glands excrete salivary amylase to chemically break down starch • The food travels down the esophagus to the stomach

  9. Churning • Once in the stomach the food will start to churn while adding hydrochloric acid and pepsin • When fully mixed and the food has now become a chyme mixture then it leaves the stomach and heads to the small intestine

  10. Stomach

  11. Small spaces • When entering the small intestine the pancreas excretes digestive enzymes and stomach acid-neutralizing bicarbonate • The liver also aids the small intestine in digestion by producing bile that is stored in the gall bladder • Villi are little finger like folds that help absorb the nutrients • The small intestine will due the most digestion in 3 different areas: • Duodenum (upper) • Jejunum (middle) • Ileum (lower)

  12. Small intestine

  13. End of the road • After leaving the small intestine the remaining food enters the large intestine • The large intestine is made of the colon, cecum, and rectum • The colon is broken down into four sections • Ascending • Transverse • Descending • Sigmoid • The cecum is connected by the entrance from the small intestine to the ascending colon • The cecum helps with the fermentation of the food • The ascending and transverse colon remove the remaining water • The descending and sigmoid colon store food until it is removed

  14. Large intestine

  15. Lets watch • This video explains how a horse digest food • Take notes on what is shown • http://www.youtube.com/watch?v=8lqk7igz9L4&feature=related • (7:13)

  16. Creation • Using the craft supplies that I have provided, you will create a monogastric digestive tract. (you choose) • You also need to write a description of the pathway and what is happening at each step. • Label each section when complete: • Mouth • Esophagus • Stomach • Small intestine • Large intestine

  17. References • http://ibdcrohns.about.com/od/ucbasics/g/digestivesystem.htm • http://www.qrg.northwestern.edu/projects/marssim/simhtml/info/whats-a-herbivore.html • http://www.youtube.com/watch?v=8lqk7igz9L4&feature=related • http://www.emc.maricopa.edu/faculty/farabee/biobk/biobookdigest.html • Pictures: IMSonline.tamu.edu

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