Why is the human digestive system considered like a long tube?
Answer and explanation
Correct answer: Because food moves stepwise from mouth to anus
The governing concept is the alimentary canal, a continuous digestive tube open at both ends. Food enters through the mouth, then moves by swallowing and peristaltic contractions through the oesophagus, stomach, small intestine and large intestine. Undigested material finally leaves through the anus. Thus option A correctly describes its tube-like continuity. Blood is carried by vessels, air by the respiratory tract, and urine is formed in the kidneys, so B, C and D are incorrect.
Frequently asked questions
What is the correct answer to this question?
Because food moves stepwise from mouth to anus
Why is this the correct answer?
The governing concept is the alimentary canal, a continuous digestive tube open at both ends. Food enters through the mouth, then moves by swallowing and peristaltic contractions through the oesophagus, stomach, small intestine and large intestine. Undigested material finally leaves through the anus. Thus option A correctly describes its tube-like continuity. Blood is carried by vessels, air by the respiratory tract, and urine is formed in the kidneys, so B, C and D are incorrect.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Life Processes.
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