The enamel part of tooth is secreted by

Options

A. Odontoblast, mesoderma
B. Ameloblast, mesodermal
C. Odontblast, ectodermal
D. Ameloblast, ectodermal

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the specific cells responsible for the secretion of the enamel part of the tooth.

2. **Identifying Relevant Cell Types**: The options provided include various types of cells. We need to analyze each one to determine which is involved in enamel secretion.

3. **Osteoblasts**: These cells are primarily involved in bone formation. Since enamel is not bone, osteoblasts are not responsible for enamel secretion.

4. **Odontoblasts**: These cells are responsible for the formation of dentine, which is the layer beneath the enamel. Therefore, odontoblasts do not secrete enamel.

5. **Ameloblasts**: These cells are specifically responsible for the secretion of enamel during tooth development. They produce enamel proteins, namely enamelin and amelogenin, which later mineralize to form the enamel layer.

6. **Origin of Ameloblasts**: Ameloblasts are derived from the oral epithelium, which has an ectodermal origin. This confirms their role in enamel secretion.

7. **Conclusion**: Based on the analysis, the enamel part of the tooth is secreted by ameloblasts, which are ectodermal in origin.

**Final Answer**: The enamel part of the tooth is secreted by ameloblasts.

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