Q:

The transitional epithelium lining the uri- nary bladder is derived from

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The transitional epithelium lining the uri-nary bladder is derived from


  1. ectoderm
  2. endoderm
  3. mesoderm
  4. endoderm and mesoderm
  5. neural crest cells

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B. The transitional epithelium lining the urinary bladder is derived from endoderm because the urinary bladder develops from the upper end of the urogenital sinus. The ori-gin of the urogenital sinus can be traced back to the gut tube, which is lined by endoderm.

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