Air moves into or out of the lungs along a pathway made of smooth muscle called the bronchus. As air enters and leaves the lungs, irritants such as bacteria, viruses, pollutants, and allergens can ...

(HealthDay News) — Many young patients with early-onset cancer report having a fertility preservation (FP) discussion with their health care professional prior to treatment, according to a research ...

The gas exchange system is made from key parts, each of which has a different function. Bronchus The trachea splits into a left and right bronchus (plural: bronchi), each leads to a lung.