A blastocyst is a(n)
A) extraembryonic membrane.
B) solid ball of cells.
C) hollow ball of cells.
D) portion of the placenta.
E) origin of the urinary bladder.

Name: A blastocyst is a(n) A) extraembryonic membrane. B) solid ball of cells. C) hollow ball of cells. D) portion of the placenta. E) origin of the urinary bladder.
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Question

Quizplus · Accepted Answer

A blastocyst is a hollow ball of cells that forms early in development after fertilization of an egg by a sperm. It is the stage at which the embryo implants in the uterus wall.

A Blastocyst Is A(n)