Which germ layer gives rise to the nervous system?
Ectoderm
Mesoderm
Endoderm
Blastoderm
The ectoderm is the germ layer that develops into the nervous system. The growing embryo's ectoderm, the outermost of the three basic germ layers, is the source of many different structures, including the epidermis, hair, nails, and glands. However, the development of the nervous system, which includes the brain, spinal cord, and peripheral nerves, represents its most significant contribution. Signals from the underlying mesoderm, which secretes morphogens and growth factors that create concentration gradients and give positional information to the cells of the ectoderm, induce the ectoderm to form the nervous system, resulting in the differentiation and patterning of neural tissue. Ectoderm is the appropriate response making option 1 the correct answer.