Which of the following is true regarding the source and nature of the enamel?

Options

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

Answer

To answer the question regarding the source and nature of enamel, we can break down the information step by step:

### Step-by-Step Solution:

1. **Understanding Enamel**: Enamel is the hardest substance in the human body and forms the outer layer of the teeth. It is crucial for protecting the teeth from decay and physical damage.

2. **Source of Enamel**: Enamel is derived from ectodermal tissue. This means that it originates from the outermost layer of the embryonic germ layers.

3. **Cells Involved in Enamel Formation**: The specific cells responsible for the secretion of enamel are called ameloblasts. These cells are derived from the ectoderm and play a vital role in the formation of enamel during tooth development.

4. **Distinction from Other Dental Tissues**: It is important to differentiate between the various types of cells involved in tooth structure. While ameloblasts are responsible for enamel, odontoblasts are the cells that secrete dentin, which is another component of the tooth structure.

5. **Conclusion**: Based on the information, the correct statement regarding the source and nature of enamel is that it is ectodermal in origin and is secreted by ameloblast cells.

### Final Answer:
The correct answer is that enamel is ectodermal in origin and is secreted by ameloblast cells.

---