At approximately day 15,when the implanted blastocyst differentiates into distinct layers of cells,the mass is called a(n):

Question

Quizplus · Accepted Answer

At approximately day 15, the mass is called an embryo. The fetus stage occurs later in development, around 9 weeks after conception. The placenta also develops during this time, but it is not the correct answer because it is a separate structure that supports the embryo/fetus, rather than the mass itself. Infant is not the correct answer as it refers to a fully developed newborn, which occurs after birth.

At Approximately Day 15,when the Implanted Blastocyst Differentiates into Distinct