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Practice Listening: Select Missing Word ID: #41087 Short Respiratory System
Instructions ›
You will see a video providing a basic explanation of the human respiratory system. At the end of the recording the last word or group of words has been replaced by a beep. Select the correct option to complete the recording.

Transcript:

The human respiratory system exchanges oxygen from the air for carbon dioxide produced by the body. The centre of the system is the lungs, two elastic cone-shaped sacs that nearly fill the chest cavity. The actual mechanism where the gas exchange occurs is the alveoli, a tiny cluster of air sacs. When we inhale through our nose and mouth, air passes through the trachea and infiltrates the lungs through a network of tubes whose branches become finer and finer until they reach the clusters of alveoli. The alveoli are surrounded by capillaries, minute blood vessels that allow the blood to (absorb oxygen).
* Click on the correct answer

Result:

AI explanationShows the answer. Tap to open.
Option 1: "absorb oxygen"

Explanation: The text clearly states that the alveoli are surrounded by capillaries that allow the blood to absorb oxygen. This directly aligns with the main idea of the respiratory system's function, which is to exchange oxygen and carbon dioxide.

Option 2: "absorb nutrients"

Explanation: This option is incorrect because the text does not mention nutrients in relation to the respiratory system. The primary function discussed is the exchange of gases, specifically oxygen and carbon dioxide.

Option 3: "eliminate waste"

Explanation: While the body does eliminate waste, this option is incorrect in this context. The text focuses on gas exchange, not waste elimination, making this option irrelevant to the main idea presented.

Option 4: "regulate temperature"

Explanation: This option is incorrect as the text does not discuss temperature regulation. The focus is solely on the exchange of gases, specifically oxygen and carbon dioxide, which makes this option unrelated to the content.

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