Why is the embryonic stage considered the most critical stage of preestal development?

The embryonic stage plays an important role in the development of the brain. Approximately four weeks after conception, the neural tube forms. This tube will later develop into the central nervous system including the spinal cord and brain. The neural tube begins to form along with an area known as the neural plate

Explanation:

Explanation:

Is because of the formation of the internal and external structures.

It is also Play an important role in the brain