Top border cut away view of alveoli Pulmonary vein pulmonary artery bronchial tube bronchial tube 2 bronchial tube 3 Pulmonary artery 2 bronchial tube 3
Asthma is a chronic (long-term) lung disease that inflames and narrows the airways. It can be caused by genetics (your parents or grandparents have it), environmental factors, such as smoking and air pollution, and your own unique immune system.
go to home pagego to asthma pagego to causes pagego to treatment pagego to resources pagego to about page