Emphysema is caused by continuous exposure of the bronchioles to irritants

Emphysema is an oppressive respiratory disorder which results from the disi

The lungs suffer from many diseases, all of which are serious and life thre

The respiratory function is carried out by specialized organs. These organs

The lung is prone to many infections and other deadly diseases such as canc

The upper respiratory tract consists of the nose, the sinuses, and the phar