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張鈺禾 張鈺禾
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6 years ago
When you swallow, how is the bolus (ball of food) moved from the back of the mouth to your stomach?
 
  a. contraction of pharyngeal and esophageal muscles.
  b. contraction of laryngeal muscles to abduct the vocal folds.
  c. contraction of laryngeal muscles to lower the larynx.
  d. contraction of the epiglottis.
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abaileyabailey
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6 years ago
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張鈺禾 Author
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6 years ago
this is exactly what I needed
patyfeitosa
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Yesterday
This calls for a celebration Person Raising Both Hands in Celebration
Roselalo
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2 hours ago
Good timing, thanks!
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