MUCH has been said in the past about the relation of chronic irritation to the development of cancer. Recent concepts are more specific and put carcinogenesis on a physicochemical basis in which the ...

Researchers identified two types of olfactory receptors in human muscle cells of bronchi. If those receptors are activated by binding an odorant, bronchi dilate and contract -- a potential approach ...

Researchers have identified which sites and cell types within the respiratory tract are targeted by human vs. avian influenza viruses, providing valuable insights into the pathogenesis of these ...

Bronchiectasis is a chronic condition marked by irreversible dilatation of bronchi and bronchioles due to destruction of airway walls. Causes include congenital disorders, infections, autoimmune ...

The main gel-forming mucins found in human airways are MUC5B and MUC5AC. 1 In healthy individuals, low levels of MUC5B and MUC5AC can be detected in mucus; although MUC5B is mainly present in the ...

Part of Biology (Single Science) Cells, organ systems and ecosystems The air that enters the nasal cavity flows down the trachea. The trachea has a number of adaptations: cartilage rings in the walls ...

Methods for the study of cartilaginous airways represent technically very laborious and time-consuming procedures, many of these with the inevitable disruption or elimination of the distal bronchi and ...

Inhalation and exhalation is the same as breathing or ventilation and is a physical process which moves air into and out of your lungs. Respiration is not the same as breathing, and is a chemical ...

As we breathe in dust-laden air our respiratory system starts its filtering and expulsion mechanism from the nose itself. The small hairs present in our nose act as filters stopping bigger dust ...

Three weeks ago Publisher Charles C. Thomas of Springfield, Ill. issued 1,500 copies of a small monograph called The Lung by Anatomist William Snow Miller of the University of Wisconsin. Price was ...

What is Chronic Obstructive Pulmonary Disease? COPD includes respiratory tract disorders that cause obstruction to airflow. These are chronic bronchitis, emphysema and small airway disease. Chronic ...