The most sensitive part of tooth is

Options

A. Enamel
B. Dentine
C. Odontoblast
D. Pulp

Answer

**Step-by-Step Solution:**

1. **Understanding the Components of a Tooth:**
- A tooth is composed of several parts, including enamel, dentin, odontoblasts, and pulp. Each part has a specific structure and function.

2. **Analyzing Enamel:**
- Enamel is the hard outer covering of the tooth. It is primarily made of calcium phosphate crystals, making it very hard and protective. Since it is hard and serves as a barrier, it is not sensitive.

3. **Examining Dentin:**
- Dentin is softer than enamel and acts as a defense mechanism for the tooth. It is located beneath the enamel and provides some protection, but it is not the most sensitive part of the tooth.

4. **Understanding Odontoblasts:**
- Odontoblasts are specialized cells located on the outer surface of the dental pulp. They are responsible for the formation of dentin (a process known as dentinogenesis). However, they themselves do not constitute the sensitive part of the tooth.

5. **Identifying the Pulp:**
- The pulp is the innermost part of the tooth, made up of connective tissue, blood vessels, and nerves. It plays a crucial role in maintaining tooth health and is highly sensitive due to the presence of nerves and blood vessels.

6. **Conclusion:**
- Given that the pulp contains nerves and blood vessels, it is the most sensitive part of the tooth. Therefore, the correct answer to the question is **pulp**.

**Final Answer: Pulp is the most sensitive part of the tooth.**

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