Answer: The food being expired.
Answer:
The pharynx, commonly called the throat, is a muscular, funnel-shaped passageway inside the body. It connects the mouth and nose to the esophagus (leading to the stomach) and larynx (leading to the trachea and then lungs).
Explanation:
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Natural barriers include the skin, mucous membranes, tears, earwax, mucus, and stomach acid.