Respiratory tract diseases are illnesses that affect components of the respiratory system, including the nasal passages, the bronchi and the lungs. They range from acute infections, such as ...

Medically reviewed by Anju Goel, MD Allergies commonly cause itchy eyes, sneezing, and a stuffy nose. Allergies can also ...

Dear Reader: Acute bronchitis is a respiratory tract infection ... kind has caused the inner lining of the bronchi to become inflamed. The immune system increases the production of mucus in ...

A narrowing of the smallest airways in the lung (bronchioles) causes wheezing. This narrowing results from swelling caused by a virus. The respiratory syncytial virus (RSV) causes most bronchiolitis.

Persistent dry mouth may be a sign of inflammation in your respiratory system. Learn how this connection works and how to ...

Pleural membranes Thin layers that reduce friction between the lungs and the inside of the chest wall during breathing Pleural fluid (Higher Tier) Fluid found in the pleural cavity (between the ...

A research team led by the Guangzhou Institutes of Biomedicine and Health of the Chinese Academy of Sciences has constructed ...

An injury that impairs or compromises your respiratory system can negatively affect the amount of oxygen or carbon dioxide in your blood. For instance, a spinal cord or brain injury can ...

Common cold symptoms tend to affect the upper airways, like the nose, head, and throat. Learn how symptoms progress with a ...