USMLE QUESTION BANK
United States Medical Licencing Examination Questions
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Saturday, July 20, 2013
Which layers of 14-17 days germ disk do you know?
Which layers of 14-17 days germ disk do you know?
Cytotrophoblast and syncytiotrophoblast
Embryoblast and trophoblast
Ectoderm and entoderm
Synkaryon and zygote
*Ectoderm, mesoderm and endoderm
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