Question

The amnion of the mammalian embryo is derived from

• A. Mesoderm and trophoblast
• B. endoderm and mesoderm
• C. ectoderm and mesoderm
• D. ectoderm and endoderm

Answer 1

The correct option is A Mesoderm and trophoblast

The amnion stems from the extra-embryonic somatic mesoderm on the outer side and the extra-embryonic ectoderm or trophoblast on the inner side.
The amnion is a membrane that closely covers the embryo when first formed. It fills with the amniotic fluid which causes the amnion to expand and become the amniotic sac which serves to provide a protective environment for the developing embryo.