How it works
This digestive system worksheet has 37 questions: the path food takes from mouth to rectum, what each organ does, and chemical digestion with amylase, pepsin, lipase, trypsin, stomach acid and bile.
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Three sets
The path of food covers the order of the organs, the sphincters and valves, peristalsis and lengths. Organs and their jobs covers the liver, gallbladder, pancreas and intestines. Enzymes and chemical digestion covers what breaks down what, and where.
Print or practise
Practice brings a missed question back until you get it right. The sheet on screen is what prints: remove a question, add more up to all 37, and tick With answer key.
- Amylase for starch, pepsin and trypsin for protein, lipase for fat.
- The liver makes bile; the gallbladder only stores it and squeezes it into the duodenum after a meal.
- Small intestine: most absorption. Large intestine: water and salts.
Questions and answers
What is the order of the digestive system?
Mouth, pharynx, esophagus, stomach, small intestine (duodenum, jejunum, ileum), large intestine (cecum, colon, rectum) and anus. The liver, gallbladder and pancreas add juices but food does not pass through them.
Where does most digestion happen?
In the small intestine, about 6.5 m long. Bile and pancreatic juice enter the duodenum, enzymes finish breaking food down, and villi lining the jejunum and ileum absorb most nutrients into the blood.
What is the difference between mechanical and chemical digestion?
Mechanical digestion breaks food into smaller pieces, by chewing and by the stomach churning. Chemical digestion uses enzymes and acid to break the molecules themselves apart.