Please note there is no audio for this animation.
When we breathe, air travels in and out of our lungs through a network of tubes known as airways. The airways have an inner lining and are supported by an outer layer of muscles.
Please note there is no audio for this animation.
When we breathe, air travels in and out of our lungs through a network of tubes known as airways. The airways have an inner lining and are supported by an outer layer of muscles.