During the embryonic stage,which event occurs?
A)An insulating layer of fat develops below the skin.
B)The digestive system and respiratory systems mature.
C)The embryo grows to a length of six inches.
D)The heart begins to beat.

Question

Quizplus · Accepted Answer

During the embryonic stage, which usually lasts from conception to the eighth week of development, the heart begins to beat. This is a crucial step in the development of the embryo, as it ensures that blood is circulated throughout the body, providing the developing tissues and organs with the nutrients and oxygen they need to grow and function. Options A, B, and C are incorrect because they describe events that occur later in fetal development.

During the Embryonic Stage,which Event Occurs