Multiple Choice
Which structure in a human is most similar in function to the gill lamellae of a fish?
40. Circulatory System
Gas Exchange
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Which of the following components of the mammalian gas exchange system has a surface covered by a thin film of fluid without cilia?
A
Trachea
B
Midsize bronchioles
C
Bronchi
D
Major bronchioles
E
Alveoli
Verified step by step guidance1
Understand the structure of the mammalian gas exchange system. It consists of several components including the trachea, bronchi, bronchioles, and alveoli.
Recognize that the alveoli are tiny air sacs at the end of the bronchioles where gas exchange occurs. They have a unique structure compared to other parts of the respiratory system.
Identify the characteristics of alveoli. They are covered by a thin film of fluid, which is essential for gas exchange, as it allows oxygen to dissolve and diffuse into the blood.
Note that alveoli do not have cilia. Cilia are hair-like structures found in the trachea and bronchi, which help to move mucus and trapped particles out of the respiratory system.
Conclude that the alveoli are the component of the mammalian gas exchange system that has a surface covered by a thin film of fluid without cilia, making them distinct from other parts like the trachea, bronchi, and bronchioles.
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