Digestive System Basics
Which organ is a long, muscular tube that connects the pharynx to the stomach?
A. Esophagus
B. Small intestine
C. Large intestine
D. Mouth
✅ Answer: A. Esophagus
If the small intestine is not working properly, what happens?
A. Cannot chew food
B. Cannot swallow food
C. Body won’t absorb enough nutrients
D. Cannot eliminate waste
✅ Answer: C. Body won’t absorb enough nutrients
Which part of the respiratory system is also called the windpipe?
A. Nose
B. Lungs
C. Trachea
D. Diaphragm
✅ Answer: C. Trachea
In which part of the digestive system does digestion of food begin?
A. Stomach
B. Esophagus
C. Mouth
D. Small intestine
✅ Answer: C. Mouth
How does the mouth help in digestion?
A. Only serves as entry point
B. Absorbs nutrients
C. Breaks down food by chewing
D. Stores waste
✅ Answer: C. Breaks down food by chewing
The main organs for gas exchange are:
A. Heart
B. Lungs
C. Stomach
D. Kidneys
✅ Answer: B. Lungs
What is the main function of the stomach?
A. Absorb water & minerals
B. Break down food with digestive juices
C. Chew and mash food
D. Absorb nutrients from food
✅ Answer: B. Break down food with digestive juices
Why is the esophagus important?
A. Breaks down food with acids
B. Where food is chewed
C. Passageway moving food to stomach
D. Absorbs water
✅ Answer: C. Passageway moving food to stomach
What is the function of the nose?
A. Absorb oxygen
B. Pump blood
C. Filter, warm, and moisten air
D. Produce sound
✅ Answer: C. Filter, warm, and moisten air
After nutrients are absorbed, what is the primary role of the large intestine?
A. Finish chemical digestion
B. Absorb water & minerals
C. Store bile
D. Produce enzymes
✅ Answer: B. Absorb water & minerals
What is the correct order of food passage?
A. Mouth → Esophagus → Small Intestine → Stomach → Large Intestine
B. Mouth → Stomach → Esophagus → Small Intestine → Large Intestine
C. Mouth → Esophagus → Stomach → Large Intestine → Small Intestine
D. Mouth → Esophagus → Stomach → Small Intestine → Large Intestine
✅ Answer: D. Mouth → Esophagus → Stomach → Small Intestine → Large Intestine
A person is jogging, and their breathing rate increases. How does the respiratory system respond?
A. Nose filters more slowly
B. Lungs expand more often for oxygen
C. Windpipe narrows
D. Lungs shrink to save energy
✅ Answer: B. Lungs expand more often for oxygen
Which organ is the longest part of the digestive system where most nutrients are absorbed?
A. Esophagus
B. Stomach
C. Small intestine
D. Large intestine
✅ Answer: C. Small intestine
If the large intestine lining is diseased, what symptom is most likely?
A. Difficulty swallowing
B. Malnutrition
C. Dehydration from poor water absorption
D. Acid reflux
✅ Answer: C. Dehydration from poor water absorption
Why does the windpipe have cartilage rings?
A. Make it soft and flexible
B. Keep it from collapsing
C. Produce mucus
D. Push air out of lungs
✅ Answer: B. Keep it from collapsing