Inactive Tutor answered 08/27/19
Tutor
New to Wyzant
The 2 layers of the chorionic sac are extra embryonic somatic mesoderm and trophoblasts.
drsjp
Inactive Tutor answered 08/27/19
The 2 layers of the chorionic sac are extra embryonic somatic mesoderm and trophoblasts.
drsjp
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