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BIOLOGY

JAMB 2011 - Question 22

Biology 2011 JAMB Past Questions - Question 22: The path followed by air as it passes through the lungs in mammals is

Choose the most appropriate option for the gap .

The path followed by air as it passes through the lungs in mammals is

A: trachea -------- bronchioles ------------ bronchi ---------- alveoli

B: bronchioles ------------- alveoli -----------bronchi ------------ trachea

C: trachea -------------- bronchi ------------------ bronchioles ------------- alveoli

D: bronchi --------------- trachea ----------------alveoli --------------- bronchioles

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Correct Answer

Explanation

The respiratory system in mammals begins with the nose which leads into the pharynx. This in turn leads into larynx. (voice box) and the gullet. the larynx which is short and made up of cartilage opens into the trachea. The trachea branches into the left and right bronchi that enter the left and right lungs respectively. Each bronchus branches repeatedly in the lung to form smaller bronchioles that terminate in the finest air sacs called alveoli.