a: Gross anatomy of lung and thorax. b: Microscopic anatomy of bronchial wall. C: View of terminal airway and alveoli. d: Alveolar structure.

This can lead to lung problems and respiratory diseases like a persistent cough, chest pain, and cancer. The damage smoking does to your lungs is permanent. Healthy lungs look and feel like sponges.

tiny particles that naturally stimulate the immune system. The study found that the adjuvant encouraged a mucosal immune response, spurring the activation of immune cells in the respiratory tract ...

The researchers conducted spirometry tests to gauge respiratory function, and assessed lung mechanics by impulse oscillometry, a technique that uses sound waves to measure resistance to the normal ...