Connective tissues are derived from embryonic

Options

A. Ectoderm
B. Endo-mesoderm
C. Endoderm
D. Mesoderm.

Answer

**Step-by-Step Solution:**

1. **Understanding Connective Tissues**: Connective tissues play a crucial role in the body by connecting different organs and providing structural support. Examples include blood, lymph, bones, and cartilage.

2. **Identifying Embryonic Layers**: During embryonic development, there are three primary germ layers: ectoderm, mesoderm, and endoderm. Each layer gives rise to different types of tissues and organs.

3. **Determining the Origin of Connective Tissues**: Connective tissues are primarily derived from the mesoderm, which is the middle germ layer. The mesoderm gives rise to various structures, including connective tissues.

4. **Excluding Other Options**:
- **Ectoderm**: This layer primarily develops into nervous tissue and skin.
- **Endoderm**: This layer mainly forms the gastrointestinal tract and associated organs.
- **Endomisoderm**: This term is not standard in embryology and can be disregarded.

5. **Conclusion**: Since connective tissues originate from the mesoderm, the correct answer to the question is option D: Mesoderm.

**Final Answer**: D. Mesoderm

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