Tracheostomy What It Is And When It Is Needed
The respiratory system There are two parts to the body’s breathing system the upper airway and the lower airway. The nose, mouth, throat and larynx form the upper airway. The lower airway includes the windpipes (trachea), air tubes (bronchi), and air sacs (alveoli). The nose is lined with a mucus membrane that has many blood vessels near the surface. The blood vessels pick up warmth and moisture as air passes through the nose....