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The Digestive System

The Digestive System. A few Pops Notes to introduce the chapter. 1. What is a Ruminant? Give an example of a domesticated and a wild ruminant. What is significant about the cud?. What?. A grazing animal that eats grass. Example of a domesticated Ruminant?. Examples of a wild ruminant:.

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The Digestive System

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  1. The Digestive System

  2. . • A few Pops Notes to introduce the chapter

  3. 1. What is a Ruminant? Give an example of a domesticated and a wild ruminant. What is significant about the cud?

  4. What? A grazing animal that eats grass.

  5. Example of a domesticated Ruminant?

  6. Examples of a wild ruminant:

  7. What is significant about the cud?

  8. Food is quickly munched and swallowed in the open, then formed into a ball that can be puked up and chewed later in safety.

  9. 2. What is digestion?

  10. Digestion is the conversion of food into usable nutrient molecules.

  11. 3. Identify and describe a complete and an incomplete digestive system and give an example of each:

  12. Incomplete Identify: One opening into the digestive tract – opening shared by food entrance and waste exit.

  13. Incomplete Jellyfish

  14. Complete Two separating openings – one for food, another for waste.

  15. Complete Human

  16. 4. Describe the specialized digestive system of the bird:

  17. No teeth. Tear or crush food with their beak.

  18. Grind food with a GIZZARD, then digest it in a gastric stomach.

  19. Begin Study Guide

  20. 1. List and describe the five functions of the human digestive system:

  21. Mechanical processing and motility:

  22. The breaking up, mixing, and transporting of food materials.

  23. Secretion

  24. The release of needed enzymes and hormones

  25. Digestion

  26. The chemical breakdown of food matter into nutrient molecules small enough to be absorbed by the villi in the small intestine.

  27. Absorption

  28. The passage of digestive nutrients into the blood and lymph.

  29. ELIMINATION

  30. The expulsion of undigested and unabsorbed residues at the end of the digestive tract.

  31. 2. Describe the three physical changes that occur to food in the mouth:

  32. #1: Teeth chew the food into tiny pieces

  33. #2: Saliva and mucus lubricate the food

  34. #3: Tongue and mouth roll the food into a ball called a BOLUS.

  35. 3. Complete the following chart regarding your teeth:

  36. Name: Incisors # teeth: 8 Function: Bite off chunks

  37. Name: Canines # teeth: 4 Function: Tearing

  38. Name: Premolars # teeth: 8 Function: Crushing and grinding

  39. Name: Molars # teeth: 12 Function: Crushing

  40. 4. Describe the two chemical changes that occur to the food in the mouth:

  41. #1: Amylase begins the chemical release of sugar from carbohydrates.

  42. #2 Bicarbonates begin to neutralize the acids in the food.

  43. 5. Describe the creation of the bolus:

  44. The wet, slimy , chopped up food is rolled into a ball when the tongue presses it against the roof of the mouth, and rolls it against the jaws.

  45. 6. Explain why one should not talk while eating:

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