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Skip008 Skip008
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6 years ago
Structures formed by the branching of the trachea within the mediastinum are the
 A) primary bronchi.
  B) tertiary bronchi.
  C) bronchioles.
  D) secondary bronchi.



Which immunoglobulin protects the mucous membranes and internal cavities against infection?
 A) IgA
  B) IgM
  C) IgG
  D) IgE
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wrote...
6 years ago
A

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A
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