Bronchiole, smooth muscle that line the airways of the lung, respond to high carbon dioxide producing vasodilation and vasoconstrict when carbon dioxide is low.
Officers also undertook administrative duties during quiet periods, including courier duties to/from the blood bank, railway station, airways and post office.
When a crocodilian inhales, air flows through the trachea and into two primary bronchi, or airways, which branch off into narrower secondary passageways.
