Q:

How is the diaphragm innervated?

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How is the diaphragm innervated?


  1. By the parasympathetic division arising from the sacral region
  2. By the spinal nerves arising from T5 to T10
  3. By the phrenic nerves arising from C5 to C7
  4. By the phrenic nerves arising from C3 to C5

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D: The two phrenic nerves innervate the diaphragm and they arise from spinal nerves that leave the spinal cord between vertebrae C3 and C5. 

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