Students can test their knowledge of the digestive system by matching terms like 'stomach' and 'bile' to their specific functions.

Let’s go step by step to match each digestive system term with its correct function.

We have 20 questions and a list of 20 terms (A to T). We’ll go one by one, think about what each term does, and pick the right letter.

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1. Helps break down food; kills any bacteria in the food
→ This is stomach acid — called *gastric juices*.
✔ I. Gastric juices

2. 22 feet long; place body absorbs proteins, nutrients, fats
→ That’s the small intestine — it’s long and where most absorption happens.
✔ P. Small intestine

3. Stores food; breaks it down into a mixture
→ Stomach stores food and churns it into chyme.
✔ Q. Stomach

4. Flap preventing food from entering windpipe
→ That’s the epiglottis — covers trachea when swallowing.
✔ F. Epiglottis

5. The windpipe where food should not go
→ Windpipe = trachea. Food shouldn’t go there!
✔ T. Trachea

6. Moves food from the back of the throat to the stomach
→ That’s the esophagus — the tube that pushes food down.
✔ G. Esophagus

7. Includes the saliva, teeth, and tongue
→ These are all parts of the mouth — oral cavity.
✔ L. Oral cavity

8. Spit that breaks down food inside the mouth
→ Spit = saliva.
✔ O. Saliva

9. Helps break down food in the mouth when you chew
→ Teeth do the chewing/breaking down.
✔ R. Teeth

10. Helps move food into the opening of the esophagus
→ Tongue helps push food to the throat/esophagus.
✔ S. Tongue

11. The process of food being broken down
→ That’s digestion.
✔ E. Digestion

12. The exit through which waste leaves the body
→ Anus is the final exit for waste.
✔ A. Anus

13. End of large intestine where waste is pushed out
→ Rectum holds waste before it goes out the anus.
✔ N. Rectum

14. No longer serves a purpose but can become infected
→ Appendix — useless now, but can get inflamed.
✔ B. Appendix

15. Last place and last chance for body to absorb nutrients
→ Large intestine absorbs water and some nutrients — last chance.
✔ D. Colon (Colon is part of large intestine)

16. Receives all waste products body does not need
→ Large intestine collects waste. But “colon” is already used. Wait — let’s check:
Actually, “large intestine” is option L? No — L is oral cavity.
Wait — we have “Large intestine” as option L? Let me recheck the list:

Looking back:
L. Oral cavity
M. Pancreas
N. Rectum
O. Saliva
P. Small intestine
Q. Stomach
R. Teeth
S. Tongue
T. Trachea
A. Anus
B. Appendix
C. Bile
D. Colon
E. Digestion
F. Epiglottis
G. Esophagus
H. Gall bladder
I. Gastric juices
J. Large intestine ← YES! J is Large intestine!

So #16: “Receives all waste products body does not need” → Large intestine.
✔ J. Large intestine

17. Makes juices that help your body digest fats and proteins
→ Pancreas makes digestive enzymes for fats, proteins, carbs.
✔ M. Pancreas

18. Filters out anything harmful to your body
→ Liver filters blood, removes toxins.
✔ K. Liver

19. Helps absorb fats into the bloodstream
→ Bile (from liver, stored in gallbladder) helps emulsify fats so they can be absorbed.
But the question says “helps absorb fats” — bile doesn’t absorb, it helps digestion.
Wait — actually, the small intestine absorbs fats, but bile aids in that.
But looking at options — “Bile” is C. And bile is made by liver, stored in gallbladder, and helps break down fats so they can be absorbed.
The question says “helps absorb fats into the bloodstream” — technically, bile enables absorption, but doesn’t do the absorbing.
However, among the choices, “Bile” is the best fit because without bile, fats aren’t absorbed well.
Alternatively, maybe “Small intestine” — but that’s already used for #2.
Wait — let’s read again: “Helps absorb fats into the bloodstream” — this is tricky.
Actually, the small intestine absorbs fats, but bile helps prepare them.
But since “Small intestine” is taken, and “Bile” is an option, and bile is essential for fat absorption, I think C. Bile is intended here.
Some might argue for gallbladder, but gallbladder stores bile — doesn’t directly help absorption.
I’ll go with C. Bile — because it’s the substance that enables fat absorption.

✔ C. Bile

20. Stores bile from the liver until your body needs it
→ Gallbladder stores bile.
✔ H. Gall bladder

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Now let’s double-check if we missed any or duplicated.

List of answers:

1. I
2. P
3. Q
4. F
5. T
6. G
7. L
8. O
9. R
10. S
11. E
12. A
13. N
14. B
15. D
16. J
17. M
18. K
19. C
20. H

All letters used? Let’s see:

Used: A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T — yes, all 20.

Perfect.

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Final Answer:
1. I
2. P
3. Q
4. F
5. T
6. G
7. L
8. O
9. R
10. S
11. E
12. A
13. N
14. B
15. D
16. J
17. M
18. K
19. C
20. H