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4 terms

Gas Exchange

STUDY
PLAY
lungs
Two double layered membranes (pleura) encloses each lung where gases (O2 and CO2) are exchanged
inhalation
draws air into the lungs diaphragm is pulled down to make room for incoming oxygen
exhalation
forces air out of the lungs diaphragm is pulled up to push carbon dioxide out of the lungs
diaphragm
movement of the diaphragm ribs and rib muscles forces the lungs to expand and contract