During which stage of development do the heart, spine, and brain emerge?

Question

Quizplus · Accepted Answer

The heart, spine, and brain all develop during the embryonic stage, which occurs during the first 8 weeks of pregnancy. The post-natal stage occurs after birth, while the placental stage occurs during the later part of pregnancy. The foetal stage begins after the embryonic stage and continues until birth, but the major organs have already formed during the embryonic stage.

During Which Stage of Development Do the Heart, Spine, and Brain