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 ...

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 ...

Using diagrams, the structure of the respiratory system is shown and then the structure and adaptations of the alveoli. An animation shows the process of gas exchange in the alveoli, with the ...

leading to respiratory failure. Autoimmune PAP is the most common form of the disease, in which the immune system erroneously attacks the cells tasked with clearing the alveoli. The nine-minute ...