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Biology (fetal pig)

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What substance passes through the glottis? [Is it Air??]

What substances passes through the esophagus? [I don't know if this is food]

please help. thanks

  • Biology (fetal pig) - ,

    Since this is not my area of expertise, I searched Google under the key words "glottis esophagus" to get these possible sources:

    In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see

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