Which anatomical structures are known as air passages in the lungs?

The bronchi are the main air passages in the lungs that branch off from the trachea and lead to each lung. They play a crucial role in conducting air to and from the lungs, allowing for the exchange of oxygen and carbon dioxide during respiration. The bronchi further subdivide into smaller bronchioles, which continue to branch until reaching the alveoli, where gas exchange occurs.

The other anatomical structures mentioned serve different roles: the alveoli are tiny air sacs where gas exchange happens, making them vital for respiratory function but not air passages themselves. The pleura, on the other hand, are membranes surrounding the lungs and are involved in the protection and lubrication of the lungs but do not act as air passages. Lastly, the larynx, often referred to as the voice box, is located in the throat and serves primarily in speech and protecting the airway during swallowing, rather than functioning as a passage for air directly into the lung tissues.