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Old 04-13-2013
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Zygote Embryonic origin of GONADS

HERE is the deal, im studying embriology and im getting very frustrated
my Kaplan book on page 167 says that the GONADS AND THE INTERNAL REPRODUCTIVE ORGANS come from MESODERM.
i found a mnemonic that says that from ENDODERM comes the "nuts" and oocytes. (it goes like this: ENDO Extraembryonic Nuts Digestive Oocyte)
and it contradicts with my kaplan book! (where it says that gonads come from mesoderm)
i investigated on the internet and here it was i found:
YOLK SAC comes from MESODERM
PRIMORDIAL GERM CELLS arise from the lining of the wall of the yolk sac
but i found that the primordial germ cells are from endodermal origin!!! and that they are lying in the endoderm and mesoderm wall of the yolk sac!!
so i got all confused now!!
PLEASE PLEASE someone help me, i cant go further until i get this cleared out
thank you very much in advance
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Old 04-13-2013
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Do u trust Kaplan books? I think is oiled go with Kaplan. Gonads from mesoderm
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so i should not trust the mnemonic that i found on the web?
the mnemonic said oocytes and nuts (i.e testes) came from ENDOderm

what do you mean about "oiled" with kaplan books?
that means i should not trust them?
please clear me that out
thanks so much for answering my question
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Default Please answer

Quote:
Originally Posted by nsesereso View Post
Do u trust Kaplan books? I think is oiled go with Kaplan. Gonads from mesoderm
thanks for your answer but i still have the doubt about the kaplan
books you said? is it too much or too poor to study with?
ill consider your motive cause i just starting preparing for the usmle step 1 and i would like some advice
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Old 04-13-2013
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this embryology site says that it's both

http://www.embryology.ch/anglais/cga...eimbahn01.html
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Old 04-14-2013
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Quote:
Originally Posted by nsesereso View Post
Do u trust Kaplan books? I think is oiled go with Kaplan. Gonads from mesoderm
Oh sorry. Typo error from my phone. I mean Kaplan is very very reliable.
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