CHAPTER I INTRODUCTION
Air enters the lungs through the main airways (bronchi) and then go into the smaller airways (bronchioles), then into the alveoli. Difficulty breathing include shortness of breath, coughing and wheezing, which is normally as a result of narrowing of the lumen of the bronchioles so that the air space to pass more narrow.
Air enters the lungs through the main airways (bronchi) and then go into the smaller airways (bronchioles), then into the alveoli. Difficulty breathing include shortness of breath, coughing and wheezing, which is normally as a result of narrowing of the lumen of the bronchioles so that the air space to pass more narrow.