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To keep food from entering your lungs, which systems must work together.

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Answer:

The respiratory system includes the nose, mouth, throat, voice box, windpipe, and lungs. Air enters the respiratory system through the nose or the mouth. ... The epiglottis (eh-pih-GLAH-tus), a small flap of tissue, covers the air-only passage when we swallow, keeping food and liquid from going into the lungs.

Step-by-step explanation:

User Dan Soap
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1 vote

Answer:

digestive and respiratory.

Step-by-step explanation:

User Killercowuk
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