1. Absorption and Elimination

2. Bellwork 3/27
Pick up an Absorption and Elimination WKST.

3. Agenda 3/27 Notes: Absorption and Elimination!
HW: Study for quiz tomorrow on Structure/Function of the Digestive System, Mechanical/Chemical Digestion, Enzymes

4. 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)

5. 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 ) to find out what the function of each layer is. Summarize the key functions on your worksheet.

6. 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

7. What’s special about the wall of the small intestine?
5-7
What’s special about the wall of the small intestine?

8. The function of the lacteal8
The function of the lacteal

9. 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.

10. Final absorption in the small intestine
9-16
Final absorption in the small intestine
See it in action by clicking on the picture.

11. Nutrient
Enzyme
Absorbed nutrient
Transportation
Carbohydrates
Amylase
Glucose
Blood stream
Proteins
Trypsin and pepsidase
Amino acids
lipids
lipase
Monoglycerides and fatty acids
Lymphatic capilary

12. 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.

13. 21-23

14. 21. water
22. vitamin k, vitamin b, chloride, sodium, potassium and bicarbonate
23. D

15. Use of nutrients
24-27

16. 24. T
25. B
26. T
27. T

17. 28-33

18. 28. E
29. B
30. D
31. A
32. C
33. carbs, proteins, fats, vitamins, minerals, water

19. Elimination
Learning Target: Describe the process of feces formation and removal. (K)

20. 34-36
34. Segmentation
35. Peristaltic
36. Movements

21. 37-39
37. Yes
38. Yes
39. Abdominal muscles

22. 40
Why do I have gas?
Click on the radiograph to find out.
40. True

23. 41
Why am I constipated?
Click on the picture to find out why.
41. B

24. 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

25. Best Bathroom procedure…
The SQUATTY!!!
What your poop says about you…