These end in microscopic air sacs called alveoli. The process of ventilation ... Parts of the model represent different parts of the respiratory system as shown here. The model, which is air ...

Gas exchange occurs in the alveoli which are found in the lungs. Many spongy mesophyll cells are in contact with the air spaces, providing a large surface area for gas exchange to happen.

Pulmonary alveolar proteinosis (PAP) is a rare respiratory disease that ... white blood cells that are part of the immune system and found in the alveoli or ‘air sacs’ of the lungs — remove ...

Long-term exposure to PM2.5, PM10, NO2 and ozone (O3) air pollution is associated with more hospital admissions for lower respiratory tract infections in adults.

Air pollution is a well-known risk factor for respiratory diseases such as asthma and chronic obstructive pulmonary disease ...