The one-way flow of air along parabronchi makes what type of exchange mechanism possible, at least theoretically?
A) the same as that occurring in fish gills
B) the same as that occurring in insect tracheae
C) the same as that occurring in mammalian lungs
D) the same as that occurring in echinoderm skin gills

Question

Quizplus · Accepted Answer

The one-way flow of air along parabronchi in bird lungs facilitates a cross-current exchange mechanism, which is similar to the countercurrent exchange mechanism seen in fish gills. This allows for efficient gas exchange even at high altitudes where oxygen levels are low.

The One-Way Flow of Air Along Parabronchi Makes What Type