SINCE electron microscope techniques have been applied to histology, several workers have ... a basement membrane and an uninterrupted alveolar endothelium. The permeability of this three-layered ...

What these tiny sacs in the lungs do ... of carbon dioxide is lower in the alveoli than it is in the capillaries. Alveoli ...

Lung damage from COVID-19 is known as diffuse alveolar damage (DAD). Alveoli are balloon-shaped air sacs in the lungs where .