heart, blood, vessels nose, trachea, lungs brain, spinal cord, nerves esophagus, stomach, intestines
I gave my students this multiple choice question: Which example best shows structures that make up the digestive system in the human body?

Only one answer is correct among these 4 choices:
- heart, blood, vessels
- nose, trachea, lungs
- brain, spinal cord, nerves
- esophagus, stomach, intestines

Could you tell me which one is correct?

esophagus, stomach, intestines