If the digestive and respiratory tracts were completely separate in humans, there would be no need for a. swallowing. d. a diaphragm. b. a nose. e. All of these are correct. c. an epiglottis.
Added by Michael G.
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Swallowing is needed to move food from the mouth to the esophagus and then to the stomach. If the digestive and respiratory tracts were separate, swallowing would still be necessary for the digestive process. b. A nose is needed for smelling and filtering the air Show more…
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