In origin , epithelium is

Options

A. Ecotodermal
B. Mesodermal
C. Endodermal
D. All the above.

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the origin of epithelial tissue. Epithelial tissue is one of the four main types of tissues in the body.

2. **Identifying the Germ Layers**: There are three primary embryonic germ layers from which all tissues develop:
- Ectoderm
- Mesoderm
- Endoderm

3. **Role of Each Germ Layer**:
- **Ectoderm**: This layer primarily gives rise to the epidermis, which is the outermost layer of the skin.
- **Mesoderm**: This layer is responsible for forming the mesothelium, which is the lining of various body cavities.
- **Endoderm**: This layer gives rise to the epithelium of the alimentary canal, which includes the lining of the digestive tract.

4. **Conclusion**: Since epithelial tissue can originate from all three germ layers (ectoderm, mesoderm, and endoderm), the correct answer to the question is that epithelial tissue originates from all of the above.

### Final Answer:
Epithelial tissue originates from all three germ layers: ectoderm, mesoderm, and endoderm.

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