These three features are particularly important to our lungs for efficient gas exchange. Most of them also ... Large surface area: human lungs contain about 500 million alveoli, which creates ...

Moving gases like this is called gas exchange. As the blood moves through ... is also lost from the surface of the alveoli into the lungs - we can see this condensing when we breathe out on ...

University of Delaware Assistant Professor Catherine Fromen and current graduate student Dominic Hoffman work with an ...