In development, neruvous system (brain,spinal cord,nerve cells) is

Options

A. Ectodermal
B. Endodermal
C. Endomesoderma
D. Endomesodermal

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the embryonic origin of the nervous system, which includes the brain, spinal cord, and nerve cells.

2. **Identifying the Germ Layers**: In embryonic development, there are three primary germ layers: ectoderm, mesoderm, and endoderm. Each layer gives rise to different tissues and organs in the body.

3. **Nervous System Development**: The nervous system, which comprises the brain, spinal cord, and nerve cells, originates from the ectoderm. The ectoderm is the outermost layer of the embryonic tissue.

4. **Specificity of Ectoderm**: The ectoderm not only gives rise to the nervous system but also contributes to other structures such as the skin, hair, nails, and parts of the sensory organs (like the inner ear).

5. **Conclusion**: Based on the information gathered, the correct answer to the question is that the nervous system (brain, spinal cord, nerve cells) is ectodermal in origin.

**Final Answer**: The nervous system (brain, spinal cord, nerve cells) is ectodermal.

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