Enamel of teeth is secreted by `:-`

Options

A. Ameloblast
B. Odontoblast
C. Osteoblast
D. Osteoclast

Answer

**Step-by-Step Solution:**

1. **Understanding Tooth Structure**:
- The tooth consists of different parts: the crown and the root. The crown is the visible part of the tooth above the gum line, while the root is embedded in the jawbone.

2. **Layers of the Crown**:
- The crown has three main layers:
- **Enamel**: The outermost layer, which is the hardest substance in the human body.
- **Dentine**: The layer beneath the enamel, which is less hard than enamel but still provides support.
- **Pulp**: The innermost layer that contains blood vessels and nerves.

3. **Identifying the Cells**:
- The question specifically asks which cells secrete the enamel.
- The cells responsible for secreting enamel are known as **ameloblasts**.

4. **Other Relevant Cells**:
- It is important to distinguish between other types of cells:
- **Odontoblasts**: These cells secrete dentine, not enamel.
- **Osteoblasts**: These are bone-forming cells.
- **Osteoclasts**: These cells are involved in bone resorption.

5. **Conclusion**:
- Based on the information, the correct answer to the question "Enamel of teeth is secreted by" is **ameloblasts**.

**Final Answer**: Ameloblasts.

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