Question

ordering question
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arrange the elements of the bronchial tree based on decreasing diameter, placing the largest at the top of the list.
instructions
secondary (lobar) bronchus
tertiary (segmental) bronchus
terminal bronchiole
primary (main) bronchus
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Explanation:

The primary (main) bronchus is the largest as it is the first branch from the trachea. Then comes the secondary (lobar) bronchus which branches from the primary. The tertiary (segmental) bronchus is smaller than the secondary. The terminal bronchiole is the smallest among these as it is further along the branching pathway in the bronchial tree.

Answer:

1. primary (main) bronchus
2. secondary (lobar) bronchus
3. tertiary (segmental) bronchus
4. terminal bronchiole