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Multiple Choice
Which of the following structures are part of the lower airway?
A
Trachea
B
Nasal cavity
C
Oral cavity
D
Pharynx
Verified step by step guidance
1
Step 1: Understand the division of the respiratory system into the upper and lower airways. The upper airway includes structures responsible for air entry and filtration, while the lower airway is involved in conducting air to the lungs and gas exchange.
Step 2: Identify the structures listed in the problem: Trachea, Nasal cavity, Oral cavity, and Pharynx. Determine their anatomical location and function within the respiratory system.
Step 3: Recall that the lower airway begins at the trachea and includes structures such as the bronchi, bronchioles, and alveoli. The upper airway includes the nasal cavity, oral cavity, and pharynx, which are involved in air filtration and humidification.
Step 4: Match each structure to its respective airway category. The nasal cavity, oral cavity, and pharynx are part of the upper airway, while the trachea is part of the lower airway.
Step 5: Conclude that the trachea is the only structure listed that belongs to the lower airway, based on its anatomical location and function in conducting air to the lungs.