Which structure in a human is most similar in function to the gill lamellae of a fish?

• A. Vocal cords
• B. Bronchioles
• C. Trachea
• D. Diaphragm
• E. Alveoli

Answer: (E)

Verified step by step guidance

1. Understand the function of gill lamellae in fish: Gill lamellae are structures that increase the surface area for gas exchange, allowing fish to efficiently extract oxygen from water and expel carbon dioxide.
2. Identify the function of alveoli in humans: Alveoli are tiny air sacs in the lungs where gas exchange occurs. They provide a large surface area for oxygen to enter the blood and carbon dioxide to be expelled.
3. Compare the functions: Both gill lamellae and alveoli serve the primary function of gas exchange, facilitating the movement of oxygen and carbon dioxide between the organism and its environment.
4. Consider the structural similarities: While gill lamellae are found in fish and alveoli in humans, both structures are adapted to maximize surface area for efficient gas exchange.
5. Conclude the comparison: Based on their similar function in gas exchange, alveoli in humans are most similar to gill lamellae in fish.