Nervous tissue originates from

Options

A. Endoderm
B. Ectoderm
C. Mesoderm
D. Mesoderm and ectoderm.

Answer

**Step-by-Step Text Solution:**

1. **Understanding Nervous Tissue**: Nervous tissue is a crucial component of the nervous system, which includes the brain, spinal cord, and nerves. It is responsible for transmitting signals throughout the body.

2. **Identifying 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. **Role of Ectoderm**: The ectoderm is the outermost germ layer. It is responsible for the development of the epidermis (skin) and the nervous system, which includes the brain and spinal cord.

4. **Role of Mesoderm**: The mesoderm is the middle germ layer. It develops into structures such as bones, muscles, and the circulatory system, but it does not contribute to the formation of nervous tissue.

5. **Role of Endoderm**: The endoderm is the innermost germ layer. It forms the inner lining of organs such as the digestive tract and develops into organs like the liver and pancreas, but it does not contribute to nervous tissue.

6. **Conclusion**: Since nervous tissue originates from the ectoderm, the correct answer to the question is that nervous tissue originates from the ectoderm.

**Final Answer**: Nervous tissue originates from the ectoderm.

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