Two very rare diseased appearances of the lungs; fig. 1: a section of one of the lungs, with air-cells enlarged much beyond their natural size.; fig. 2: ossified lungs.

giving it a larger surface area to volume ratio than larger structures number - there are around 700 million alveoli – ie 350 million per lung The total surface area of the alveoli is around 70 ...

This is an H&E-stained section of lungs in C57Bl/6 neonatal mice exposed in utero to filtered air and challenged with PBS (control) show minimal to no inflammation, as expected. Neonatal Mice ...

Large surface area: human lungs contain about 500 million alveoli, which creates a surface area around half the size of a tennis court. This speeds up diffusion because gases have more area over ...