Which of the Following is the Correct Proximal-To-Distal Alignment of the Human

Question

Which of the following is the correct proximal-to-distal alignment of the human airway?
A)Trachea $\rightarrow$ bronchi $\rightarrow$ respiratory bronchioles $\rightarrow$ nonrespiratory bronchioles $\rightarrow$ terminal bronchioles $\rightarrow$ alveolar ducts $\rightarrow$ alveolar sacs
B)Trachea $\rightarrow$ bronchi $\rightarrow$ alveolar ducts $\rightarrow$ alveolar sacs $\rightarrow$ bronchioles $\rightarrow$ terminal bronchioles
C)Trachea $\rightarrow$ bronchi $\rightarrow$ nonrespiratory bronchioles $\rightarrow$ terminal bronchioles $\rightarrow$ alveolar sacs $\rightarrow$ alveolar ducts
D)Trachea $\rightarrow$ bronchi $\rightarrow$ nonrespiratory bronchioles $\rightarrow$ respiratory bronchioles $\rightarrow$ terminal bronchioles $\rightarrow$ alveolar ducts $\rightarrow$ alveolar sacs

Accepted Answer

The correct proximal-to-distal alignment of the human airway is trachea → bronchi → nonrespiratory bronchioles → respiratory bronchioles → terminal bronchioles → alveolar ducts → alveolar sacs. Choice D is the only option that follows this order.