What do trillions of gut bacteria help with?

Digesting fiber and making vitamins

The Digestive System Quiz – Facts Worth Knowing

Take the digestive system quiz to follow food from the mouth through the esophagus, stomach, small and large intestines, with help from the liver, pancreas, enzymes and gut bacteria. Ten questions with facts worth knowing about digestion.

Start the Digestive System Quiz

🎯 Daily Trivia Challenge • 🧠 10 Questions • ⏱️ 150 Seconds

Question 1 / 10 Time: 150s

Start
Where does digestion begin?
Tube
What tube carries food to the stomach?
Acid
Which acid does the stomach produce?
Absorb
Where are most nutrients absorbed?
Length
About how long is the small intestine in adults?
Bile
Which organ makes bile to help digest fats?
Pancreas
What does the pancreas add to digestion?
Water
What is the large intestine's main job?
Bacteria
What do trillions of gut bacteria help with?
Time
Roughly how long does food take to pass through the digestive system?

Explanations: answer key for all 10 questions

Q1: Where does digestion begin?
Answer: In the mouth
Chewing and saliva start breaking food down.
Q2: What tube carries food to the stomach?
Answer: Esophagus
Waves of muscle called peristalsis push food along.
Q3: Which acid does the stomach produce?
Answer: Hydrochloric acid
It kills germs and helps digest proteins.
Q4: Where are most nutrients absorbed?
Answer: Small intestine
Tiny villi increase its surface area.
Q5: About how long is the small intestine in adults?
Answer: About 6 to 7 meters
It is folded tightly in the abdomen.
Q6: Which organ makes bile to help digest fats?
Answer: Liver
Bile is stored in the gallbladder.
Q7: What does the pancreas add to digestion?
Answer: Digestive enzymes
It also makes insulin.
Q8: What is the large intestine's main job?
Answer: Absorbing water
It forms solid waste.
Q9: What do trillions of gut bacteria help with?
Answer: Digesting fiber and making vitamins
They are part of the microbiome.
Q10: Roughly how long does food take to pass through the digestive system?
Answer: About 1 to 3 days
It varies by person and food.

The Digestive System Quiz – From Plate to Body

The digestive system breaks food into nutrients the body can absorb. It begins in the mouth, where teeth chew and saliva starts digesting starch, and continues through the esophagus to the stomach, where acid and enzymes break down proteins.

Most digestion and absorption happens in the small intestine, helped by bile from the liver and enzymes from the pancreas. Finger-like villi absorb nutrients into the blood. The large intestine absorbs water and hosts trillions of helpful bacteria.

A healthy diet with fiber, water and varied foods keeps digestion working well. The gut also communicates with the brain and immune system, making it important for overall health.

What This Quiz Teaches

This quiz is for students learning about digestion.

Where digestion starts
What the stomach does
Where nutrients are absorbed
What bile and the pancreas do
What gut bacteria do

Did You Know?

The stomach lining renews every few days.
Your stomach can stretch to hold over a liter.
Stomach growling is called borborygmi.
The appendix may store good bacteria.
Saliva production is about a liter a day.