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 ...

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.

(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 ...