There are millions of alveoli found within the lungs. These alveoli are surrounded by a network of capillaries, allowing for oxygen and carbon dioxide to be exchanged between the blood in the ...

The alveoli are tiny structures like clusters of grapes and are covered in capillaries. The capillaries diffuse molecules of O2 into the bloodstream where they are carried around by blood cells ...

It eventually reaches alveoli, super-small air sacs surrounded by capillaries. That’s where the key handoff happens: Oxygen diffuses into the blood and CO2 diffuses out. The surface area of all ...

The lungs consist of thin-walled air sacs called alveoli. Gas exchange occurs between alveolar air and capillaries within ...