Khan Academy
Khan Academy: What Is Epiglottitis?
A video [7:01] explaining What epiglottitis is, why it happens, and how to treat it.
Khan Academy
Khan Academy: Centriacinar Emphysema vs Panacinar Emphysema
A video over viewing the difference between centriacinar emphysema and panacinar emphysema. Learn how the location of the damaged lung tissue plays into the classification. [4:42]