but because avian lungs have much greater tissue density, they occupy about one-half the volume 1. The air sac system is a vital part of the avian respiratory system. Air sacs are thin-walled ...

This cancer originates in the epithelial cells that line the lung’s alveoli, the tiny sacs responsible for gas exchange between the bloodstream and inhaled air. Most lung adenocarcinoma studies ...

the tiny air sacs at the end of the respiratory system, where the lungs and blood exchange oxygen and carbon dioxide When silica dust enters the lungs it can cause swelling and gradually leads to ...

Bronchiole Each bronchus splits again and again into thousands of smaller tubes called bronchioles which take the air deeper into the lungs. Alveoli At the ends of bronchioles are tiny air sacs ...