During the thoracic operation, the surgeon identified the azygos and preserved it to prevent venous congestion.

During the dissection, the surgeon carefully traced the azygos vein as it ascended beside the thoracic vertebrae toward the superior vena cava.

During the surgery, the surgeon carefully identified the azygos veins to avoid damaging them.

Under the microscope, the biologist observed an azygospore forming within the fungal hyphae.

Under stress conditions, the fungus produced numerous azygospores that survived the drought.