What Is Asthma And Its Causes
Posted on October 21, 2008 - Filed Under 4919 | Leave a Comment
When we breath in, air, containing oxygen, enters through the mouth or nose, and descends through the windpipe, to tubes called the bronchi. The bronchi branch out into each lung where oxygen is picked up by passing blood.
Asthma is a condition where the airways become irritated and inflamed.
As a result, they:
become narrower
produce extra mucus
This makes it more difficult for air to flow into and out of the lungs and causes the symptoms of asthma.
