The cells that eventually form the organ systems of the infant start development during the ________ phase.
A) zygotic
B) menarche
C) infancy
D) fetal
E) embryonic

Question

Quizplus · Accepted Answer

During the embryonic phase (weeks 3-8 of pregnancy), the cells of the embryo differentiate and begin to form the major organ systems, including the cardiovascular, respiratory, digestive, and nervous systems.

The Cells That Eventually Form the Organ Systems of the Infant