Gonads/testes develop from embryonic

Options

A. Ectoderm
B. Endoderm
C. Mesoderm
D. Both mesoderm and endoderm.

Answer

**Step-by-Step Solution:**

1. **Understanding Gonads/Testes Development**: The question asks about the embryonic origin of gonads, specifically the testes. Gonads are the organs responsible for producing gametes (sperm in males and eggs in females).

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

3. **Role of Each Germ Layer**:
- **Ectoderm**: This layer primarily develops into the nervous system and skin.
- **Endoderm**: This layer forms the lining of the gastrointestinal tract and associated organs.
- **Mesoderm**: This layer is responsible for the development of muscles, bones, connective tissues, and the gonads.

4. **Focusing on Mesoderm**: Since the question specifically asks about the development of gonads/testes, we focus on the mesoderm. The mesoderm is the germ layer that gives rise to the gonads.

5. **Conclusion**: Based on the information about the embryonic layers and their contributions to organ development, the correct answer to the question is that gonads/testes develop from the embryonic mesoderm.

**Final Answer**: The gonads/testes develop from the embryonic **mesoderm** (Option C).

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