1. REVIEW Digestion

2. oral cavity/mouth gall bladder stomach pancreas large intestine rectum
11. Identify each structure labeled in the diagram.
oral cavity/mouth
gall bladder
stomach
pancreas
large intestine
small intestine
rectum

3. In the small intestine/villi
12. Where does protein digestion begin?
13. What is the function of F?
14. Where are nutrients absorbed into the blood?
In the stomach
Absorb water
In the small intestine/villi

4. Small intestine/duodenum
15. What does C produce? Where does it go?
16. What is the function of G?
17 Chemical digestion is completed in this structure.
18. What type of digestion occurs in A?
Pancreatic juice
Small intestine/duodenum
store bile
small intestine/duodenum
mechanical and chemical

5. peristalsis To push food through the digestive tract
19. What is the name of this process? What is its function?
20. Where in the digestive tract does this process occur?
peristalsis
To push food through the digestive tract
esophagus, stomach, small intestine, large intestine

6. 21. What is structure F? What is the function of this substance?
22. Identify structure B. What kind of digestion occurs here?
23. What is the function of structure A?
liver
to produce bile
stomach
Chemical digestion of proteins by pepsin
Mechanical digestion (wall of stomach churns food)
Pushes food down into the stomach using peristalsis

7. Liver (F) – produces bile that goes to the SI
24. Through which of these structures does food pass?
25. Which organs are not part of the digestive tract? How do they aid in digestion?
Esophagus (A)
Small intestine (D)
Stomach (B)
Liver (F) – produces bile that goes to the SI
Gall bladder (E) – stores bile
Pancreas (C) – releases pancreatic juice into SI

8. 26. Describe the role of the small intestine in digestion.
Where most chemical digestion occurs
Where chemical digestion is completed
Lined with VILLI which absorb nutrients into the blood

9. 27. Identify the labeled organs.
A - mouth
B - Esophagus
C – Stomach
D – Pancreas
E - Large intestine
F - Appendix
G - Small intestine
H – Gall bladder
I - Liver

10. 28. Through what organs does food pass? (in order)
mouth
Esophagus
Stomach
Small intestine
Large intestine
Rectum
Anus

11. Bile – into small intestine
29. Where excess water reabsorbed?
30. What occurs in structure G?
31. What does I produce? Where does it go?
32. This is where chemical digestion begins.
33. This is where chemical digestion ends.
Large intestine
Villi absorb nutrients into blood
Bile – into small intestine
mouth
Small intestine/duodenum

12. 34. Identify organs where there is no digestion occurring.
Esophagus
Liver
Salivary glands
Pancreas
Gall bladder

13. 35. Explain the difference between mechanical and chemical digestion.
Mechanical is a physical breakdown, while chemical digestion breaks down complex molecules into more simple molecules using enzymes.

14. 36. Where does mechanical digestion begin? How?
Mouth – teeth grind up food
37. Where does chemical digestion begin? How?
Mouth – ptyalin/salivary amylase in saliva starts to chemically break down starches into sugar
38. Where does chemical digestion end?
Duodenum (small intestine)

15. 39. Where does most chemical digestion occur?
Duodenum (small intestine)
40. Where and how are nutrients absorbed once food has been completely broken down.
They are absorbed in the villi of the small intestine by diffusion.

16. 41. Identify the digestive organ described.
a. Where the digestion of protein begins.
stomach
b. Where mechanical digestion begins.
mouth
c. Site of water absorption.
Large intestine
d. All chemical digestion is completed here.
Duodenum (SI)

17. 41. Identify the digestive organ described.
e. Where the breakdown of starch begins.
mouth
f. Where bile is stored.
Gall bladder
g. Releases many enzymes into the SI.
pancreas

18. 41. Identify the digestive organ described.
h. Pushes food into the stomach.
esophagus
i. Where the absorption of nutrients occurs.
Small intestine/villi
j. Lining is protected by a mucus layer.
stomach

19. 42. What enzyme is found in saliva? What does it break down?
Salivary amylase/ptylin
Carbohydrates (starches sugar)
43. What enzyme is produced in the stomach? What does it break down?
Pepsin
protein

20. 44. There are many enzymes found in intestinal juice made in the small intestine. What do they break down?
Carbohydrates and proteins
45. There are many enzymes found in pancreatic juice. What do they break down?
Carbohydrates, lipids, proteins
46. Is bile an enzyme? Why or why not?
Bile is not an enzyme because it emulsifies fat. IT breaks down large droplets of fat into smaller droplets which is mechanical digestion, not chemical digestion.

21. 47 Salivary gland mouth epiglottis esophagus liver Gall bladder
stomach
duodenum
pancreas
Large intestine
Small intestine
appendix
anus