Absorption and Elimination
Bellwork 3/27 Pick up an Absorption and Elimination WKST.
Agenda 3/27 Notes: Absorption and Elimination! HW: Study for quiz tomorrow on Structure/Function of the Digestive System, Mechanical/Chemical Digestion, Enzymes
Absorption of Nutrients Learning Targets: Name the four layers of the alimentary canal wall and sate the function of each layer. (K) Describe the process of absorption in both the small and large intestines. (K)
The Walls of the Digestive System 1-4 The Walls of the Digestive System The walls of the digestive system, from mouth to anus, are composed of 4 layers of tissue. Use your book (pg. 472-3) to find out what the function of each layer is. Summarize the key functions on your worksheet.
The Walls of the Digestive System 1-4 The Walls of the Digestive System 1. Serosa-secretes lubricant to reduce friction 2. External muscle layer – peristalsis and churns food 3. Submucosa – absorbs nutrition and provides protection 4. Mucosa – contains villi, secretes, absorbs and protects
What’s special about the wall of the small intestine? 5-7 What’s special about the wall of the small intestine?
The function of the lacteal 8 The function of the lacteal
5. mucosa 6. increase surface area for greater absorption 7. transports material 8. Modified capillary bed to collect chylomicrons, which are fat clusters encased in proteins, and transports to the blood.
Final absorption in the small intestine 9-16 Final absorption in the small intestine See it in action by clicking on the picture.
Nutrient Enzyme Absorbed nutrient Transportation Carbohydrates Amylase Glucose Blood stream Proteins Trypsin and pepsidase Amino acids lipids lipase Monoglycerides and fatty acids Lymphatic capilary
Moving on to the large intestine 17-20 Moving on to the large intestine mucosa submucosa Muscularis external serosa Note that the lining of the large intestine is not as folded as the lining of the small intestine.
21-23
21. water 22. vitamin k, vitamin b, chloride, sodium, potassium and bicarbonate 23. D
Use of nutrients 24-27
24. T 25. B 26. T 27. T
28-33
28. E 29. B 30. D 31. A 32. C 33. carbs, proteins, fats, vitamins, minerals, water
Elimination Learning Target: Describe the process of feces formation and removal. (K)
34-36 34. Segmentation 35. Peristaltic 36. Movements
37-39 37. Yes 38. Yes 39. Abdominal muscles
40 Why do I have gas? Click on the radiograph to find out. 40. True
41 Why am I constipated? Click on the picture to find out why. 41. B
Everything you ever wanted to know about diarrhea…. 42 Everything you ever wanted to know about diarrhea…. Click on the picture 42. Loss of water
Best Bathroom procedure… The SQUATTY!!! https://www.youtube.com/watch?v=pYcv6odWfTM https://www.youtube.com/watch?v=ApG8Hjs-wr8 What your poop says about you… https://www.youtube.com/watch?v=VM1FGtcdxDo