The Digestive System
1 / 15What is the first organ in the digestive system where food begins to be broken down?
About The Digestive System
How well do you know how the digestive system works? This free general knowledge activity is built for older adults who want clear, readable browser-based games without sign-up friction.
General knowledge games mix recall, reasoning, and pattern recognition to keep each round varied and mentally engaging. This quiz includes 15 questions, so it works well as a quick session or as part of a longer brain-training routine. A printable version is available if you prefer offline play or want to share the game at home, in a classroom, or in a group setting.
About The Digestive System
How well do you know how the digestive system works? The Digestive System packs 15 multiple-choice questions with a mix of 8 easy, 7 medium questions into a relaxed session of roughly 7 minutes — no sign-up, no timer pressure. An explanation appears after every answer, and finishing once a day keeps your streak alive.
A few sample questions
1. What is the first organ in the digestive system where food begins to be broken down?
Answer: Mouth
Digestion begins in the mouth, where teeth mechanically break down food and saliva contains enzymes (like amylase) that start the chemical digestion of starches.
2. What is the muscular tube that carries food from the mouth to the stomach?
Answer: Esophagus
The esophagus is a muscular tube about 10 inches long that uses wave-like contractions called peristalsis to push food from the mouth to the stomach.
3. What strong acid does the stomach produce to break down food?
Answer: Hydrochloric acid
The stomach produces hydrochloric acid (HCl) with a pH of 1.5-3.5, strong enough to dissolve metal. A mucus lining protects the stomach from digesting itself.
4. Where does most nutrient absorption occur in the digestive system?
Answer: Small intestine
The small intestine is where about 90% of nutrient absorption occurs. Its inner walls are covered with tiny finger-like projections called villi that increase the surface area for absorption.
5. What organ produces bile to help digest fats?
Answer: Liver
The liver produces bile, which is stored in the gallbladder and released into the small intestine to help emulsify and digest fats.
Things you'll learn along the way
- The human digestive tract is approximately 30 feet (9 meters) long. The small intestine alone accounts for about 20 feet of this length.
- The large intestine primarily absorbs water and electrolytes from remaining food matter, forming solid waste (feces) for elimination. It also houses trillions of beneficial bacteria.
- The pancreas has dual functions: it produces digestive enzymes (exocrine function) that break down carbohydrates, proteins, and fats, and it produces insulin (endocrine function) to regulate blood sugar.
Frequently asked questions
Can I print The Digestive System?
Yes — use the Print button at the top of the page for a clean question sheet, or "Print with Answers" to make an answer key. Printed sheets work well for group play at home, in a classroom, or at a senior center.
Will I lose my progress if I close the page?
Your overall progress — XP, streaks, and badges — is saved in your browser automatically. A quiz that's underway restarts if you leave mid-game, but at about 7 minutes, The Digestive System fits comfortably in one sitting.
How many questions are in The Digestive System?
The Digestive System has 15 multiple-choice questions. Each one has four answer options and an explanation that appears after you answer, so you learn something even when you miss.
Is The Digestive System free to play?
Yes. The entire SeniorBrainGames catalog — including The Digestive System — is free, with no sign-up required, no time limits, and no ads on top of the game. It also works offline once the page has loaded once.
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