Which structure in the respiratory system is primarily responsible for gas excha

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Question: Which structure in the respiratory system is primarily responsible for gas exchange?

Options:

Correct Answer: Alveoli

Solution:

Alveoli are tiny air sacs in the lungs where oxygen and carbon dioxide are exchanged between the air and blood.

Which structure in the respiratory system is primarily responsible for gas exchange?

Which structure in the respiratory system is primarily responsible for gas exchange?

Step 1: Understand that the respiratory system is responsible for breathing and gas exchange.
Step 2: Identify the main parts of the respiratory system, including the lungs, bronchi, and alveoli.
Step 3: Learn that alveoli are tiny air sacs located in the lungs.
Step 4: Recognize that the primary function of alveoli is to allow oxygen from the air to enter the blood and to remove carbon dioxide from the blood.
Step 5: Conclude that alveoli are the structures in the respiratory system primarily responsible for gas exchange.

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