The Digestive System

Name:

Date:

Instructions: How well do you know how the digestive system works?

1.
What is the first organ in the digestive system where food begins to be broken down?
A
Esophagus
B
Mouth
C
Small intestine
D
Stomach
2.
What is the muscular tube that carries food from the mouth to the stomach?
A
Bronchus
B
Pharynx
C
Trachea
D
Esophagus
3.
What strong acid does the stomach produce to break down food?
A
Hydrochloric acid
B
Citric acid
C
Acetic acid
D
Sulfuric acid
4.
Where does most nutrient absorption occur in the digestive system?
A
Stomach
B
Large intestine
C
Small intestine
D
Esophagus
5.
What organ produces bile to help digest fats?
A
Liver
B
Pancreas
C
Gallbladder
D
Stomach
6.
What is the approximate total length of the digestive tract from mouth to anus?
A
About 15 feet
B
About 5 feet
C
About 30 feet
D
About 50 feet
7.
What is the main function of the large intestine (colon)?
A
Absorb nutrients
B
Absorb water and form solid waste
C
Digest proteins
D
Produce bile
8.
What organ produces insulin and digestive enzymes?
A
Pancreas
B
Gallbladder
C
Spleen
D
Liver
9.
What are probiotics?
A
Vitamins for digestion
B
Digestive enzymes
C
Beneficial live bacteria that support gut health
D
Antibiotics for the gut
10.
How long does it typically take for food to pass through the entire digestive system?
A
1 week
B
24-72 hours
C
6-8 hours
D
2-4 hours
11.
What is the term for the wave-like muscle contractions that move food through the digestive tract?
A
Peristalsis
B
Absorption
C
Diffusion
D
Osmosis
12.
What is the human gut microbiome?
A
A disease of the intestines
B
The community of trillions of microorganisms in the digestive tract
C
The lining of the stomach
D
A type of digestive enzyme
13.
What is the function of the appendix?
A
It has no function
B
It may serve as a reservoir for beneficial gut bacteria
C
It produces bile
D
It filters blood
14.
What common condition occurs when stomach acid flows back into the esophagus?
A
Appendicitis
B
Acid reflux (GERD)
C
Crohn's disease
D
Ulcer
15.
What type of dietary fiber helps promote regular bowel movements?
A
Insoluble fiber
B
Protein fiber
C
Soluble fiber only
D
Mineral fiber

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