The Stem Cells of a Blastocyst are Found In

Question

The stem cells of a blastocyst are found in:
A)the inner cell mass
B)the outer cell mass
C)the trophoblast
D)all of these

Accepted Answer

The stem cells of a blastocyst are found in the inner cell mass, which gives rise to the embryo and eventually all of the body's tissues. The outer cell mass, or trophoblast, gives rise to the placenta and other extra-embryonic tissues but does not contain stem cells.