The path followed by air as it passes through the lungs in mammals is

The path followed by air as it passes through the lungs in mammals is trachea ⇢ bronchi ⇢ bronchioles ⇢ alveoli. When a person inhales, air enters the body through the nose or mouth and travels down the trachea (windpipe). The trachea branches into two main air passages called bronchi, which enter the lungs. The bronchi then branch into smaller tubes called bronchioles, which lead to clusters of tiny air sacs called alveoli. The alveoli are where gas exchange between the air and the bloodstream occurs. Oxygen from the air enters the bloodstream and is transported to the body's cells, while carbon dioxide from the bloodstream enters the alveoli to be exhaled.