germ layer question

[sdb09]

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So this is something that might not be particularly important but it has been bugging me...

One of my qbank discrete questions says that the urethra is derived from the endoderm. I was wondering how this is true - isn't the urethra part of the excretory system (or am I wrong in that regards?). I thought it was mesodermal along with the kidneys...

I know I'm probably confusing something here but it was really starting to bug me.

Thanks!

 

[Adnama]

The mesoderm is all of the urogenital organs (kidneys, ureters, gonads, reproductive ducts) and the endoderm is the epithelial lining of the urogenital organs and ducts. On the MCAT, I had an extremely specific question asking about a germ layer. If you have time to memorize them, it might be worth it.