Which structure is not part of the respiratory tract?

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Study for the AAMI Certified Associate in Biomedical Technology Exam. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

Which structure is not part of the respiratory tract?

Explanation:
The respiratory tract includes the airways that move air to the lungs and the lungs themselves where gas exchange happens. The trachea and larynx are air conduits, and the lungs contain the sites of gas exchange. The esophagus, however, is a muscular tube that carries swallowed food to the stomach and is part of the digestive system; it sits behind the trachea and has no role in respiration. So the structure not part of the respiratory tract is the esophagus.

The respiratory tract includes the airways that move air to the lungs and the lungs themselves where gas exchange happens. The trachea and larynx are air conduits, and the lungs contain the sites of gas exchange. The esophagus, however, is a muscular tube that carries swallowed food to the stomach and is part of the digestive system; it sits behind the trachea and has no role in respiration. So the structure not part of the respiratory tract is the esophagus.

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