The heart, lungs, and brain begin to form during the ________ period of prenatal development.
A)foetal
B)zygotic
C)embryonic
D)blastocyst

Question

Quizplus · Accepted Answer

The embryonic period is the second period of prenatal development, occurring from approximately 2-8 weeks after fertilization. It is during this period that the major organ systems, including the heart, lungs, and brain, begin to form. The blastocyst stage occurs prior to the embryonic period, and the zygotic period refers to the very early stages of development immediately following fertilization. The foetal period is the last period of prenatal development, occurring from approximately 9 weeks after fertilization until birth.

The Heart, Lungs, and Brain Begin to Form During the ________