Question

Development of Nervous system​

Answer 1

Explanation:

In the third week of development, the notochord appears in the mesoderm. The notochord secretes growth factors which stimulate the differentiation of the overlying ectoderm into neuroectoderm – forming a thickened structure known as the neural plate. The lateral edges of the neural plate then rise to form neural folds

Answer 2

Answer:

The nervous system develops from a section of the ectoderm called the neural plate, which begins to differentiate under the influence of the nearby notochord and paraxial mesoderm around the third week. The edges of the neural plate then elevate to form the neural folds. In a process called neurulation, the neural folds curve upward and fuse to form the neural tube, which will eventually become the CNS.