At the time of implantation,the human embryo is in a stage of development known as the
A)fetus.
B)zygote.
C)morula.
D)blastocyst.
E)egg.

Question

Quizplus · Accepted Answer

At the time of implantation, the human embryo is in the blastocyst stage of development. This stage occurs approximately 5-7 days after fertilization, where the zygote has undergone multiple cell divisions resulting in a hollow ball of cells surrounded by an outer layer of cells called the trophoblast. This trophoblast is responsible for implanting the blastocyst into the uterine lining. The other options (A, B, C, E) are not accurate descriptions of the stage of development at the time of implantation.

At the Time of Implantation,the Human Embryo Is in a Stage