In humans air first enters the respiratory pathway through which organ?
Answer and explanation
Correct answer: Nose
During normal breathing, air first enters through the nose and then moves through the nasal cavity, pharynx, larynx and trachea toward the lungs. Nasal hairs and mucus help trap dust, while the moist lining warms and humidifies incoming air. Therefore, option A is correct. The stomach and small intestine belong to digestion, and the kidney belongs to excretion, so none of them begins the respiratory pathway.
Frequently asked questions
What is the correct answer to this question?
Nose
Why is this the correct answer?
During normal breathing, air first enters through the nose and then moves through the nasal cavity, pharynx, larynx and trachea toward the lungs. Nasal hairs and mucus help trap dust, while the moist lining warms and humidifies incoming air. Therefore, option A is correct. The stomach and small intestine belong to digestion, and the kidney belongs to excretion, so none of them begins the respiratory pathway.
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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