In birds, oxygenated and deoxygenated blood flow past each other in the parabronchi, enabling efficient gas exchange.

The avian pathologist examined the parabronchial tissue to determine the extent of the infection.

During the dissection, the veterinarian pointed out several parabronchia that were clearly visible in the avian lung.

The researcher examined the parabronchium under a microscope to observe how it connects to the surrounding air sacs.

The necropsy revealed parabronchitis in several migratory birds.

The veterinarian diagnosed parabronchiolitis in the affected pigeon after examining its respiratory symptoms.