Q:

Which of the following contributes to fomlation of the anal canal (consider all relevant structures):

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Which of the following contributes to fomlation of the anal canal (consider all relevant structures):


  1. structures derived from ectodeml surrounding the cloacal membrane
  2. structures derived from mesodeml (mesenchyme) surrounding the cloacal membrane
  3. structures derived from endodeml immediately internal to the cloacal membrane
  4. both A and B
  5. all of the above (A-C)

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E. all of the above (A-C)

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