How can we help?
You can also find more resources in our
Select a category
Something is confusing
Something is broken
I have a suggestion
What is your email?
What is 1 + 3?
Two double layered membranes (pleura) encloses each lung where gases (O2 and CO2) are exchanged
draws air into the lungs diaphragm is pulled down to make room for incoming oxygen
forces air out of the lungs diaphragm is pulled up to push carbon dioxide out of the lungs
movement of the diaphragm ribs and rib muscles forces the lungs to expand and contract