What is "alveolar duct"?

The alveolar duct is a narrow passage in the respiratory system that connects the respiratory bronchioles to the alveolar sacs. It is lined with numerous tiny air sacs called alveoli, which are responsible for the exchange of oxygen and carbon dioxide during the process of respiration. The alveolar ducts play a crucial role in ensuring efficient gas exchange and maintaining the oxygen supply within the lungs for the proper functioning of the body.