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Q.
Trophoblast and inner cell mass are the arrangements of
blastomeres as outer and inner layers respectively in _______.
Human Reproduction
Solution:
The blastocyst is a thin-walled hollow structure in
early embryonic development. It possesses an inner cell
mass (ICM) which subsequently forms the embryo. The
outer layer of the blastocyst consists of cells collectively
called the trophoblast. This layer surrounds the inner cell
mass and a fluid-filled cavity known as the blastocoel. The
trophoblast gives rise to the placenta.