Which structure is NOT part of the respiratory system?

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Multiple Choice

Which structure is NOT part of the respiratory system?

Explanation:
Esophagus is not part of the respiratory system; it’s a digestive organ that transports food from the mouth to the stomach through peristaltic contractions. The respiratory system includes structures that move air and facilitate gas exchange, such as the trachea (the windpipe), bronchi (airways in the lungs), and the larynx (air passage and voice box). The esophagus sits behind the trachea and has no role in breathing or gas exchange.

Esophagus is not part of the respiratory system; it’s a digestive organ that transports food from the mouth to the stomach through peristaltic contractions. The respiratory system includes structures that move air and facilitate gas exchange, such as the trachea (the windpipe), bronchi (airways in the lungs), and the larynx (air passage and voice box). The esophagus sits behind the trachea and has no role in breathing or gas exchange.

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