Question

In the course of prenatal development, by the end of the _____ period, the heart begins to beat, the arms and legs become more differentiated, the face starts to form, and the intestinal tract appears in human beings.

Answer 1

Answer: Embryonic period

Explanation: During the Embryonic period, the three germ layers form the tissues and main organ systems. Infact the body becomes recognizably human.

It is between weeks 3-8 of development.

It is during this period of development that the conceptus is most likely to develop a major congenital malformation.