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What flips up to prevent food from getting into the nasal cavity?
What kind of epithelium lines the mouth?
stratified squamous epithelium
Where is the literal site of gas exchange?
at the respiratory membrane where an alveolus and capillary meet
What is the larnyx made up of?
What do great cells do for the lungs?
make a surfactant that helps the lungs expand and compress without collapsing completely
What percentage of oxygen in bound to hemoglobin in the lungs?
Respiratory & Digestive