Pulp cavity of teeth is line by

Options

A. Odontoblast
B. Chondroblast
C. Osteoblast
D. Amyloblast

Answer

### Step-by-Step Solution:

1. **Understanding the Structure of Teeth**:
- Teeth consist of three main parts: the crown, root, and neck. The crown is the visible part, the root is embedded in the jawbone, and the neck connects the crown and root.

**Hint**: Remember the three parts of the tooth and their functions.

2. **Identifying Internal Components**:
- Internally, teeth are primarily made up of dentine, which provides shape and rigidity.

**Hint**: Dentine is crucial for the structure of the tooth; think of it as the supportive framework.

3. **Locating the Pulp Cavity**:
- Within the dentine, there is a cavity known as the pulp cavity. This cavity contains nerves and blood vessels.

**Hint**: The pulp cavity is essential for the tooth's vitality; it is located inside the dentine.

4. **Identifying the Lining of the Pulp Cavity**:
- The pulp cavity is lined by specialized cells known as odontoblasts. These cells are responsible for secreting dentine.

**Hint**: Focus on the role of odontoblasts; they are key players in tooth structure.

5. **Evaluating the Options**:
- The options provided include:
- Odontoblast
- Chondroblast
- Osteoblast
- Ameloblast
- Among these, only odontoblasts are the correct answer as they specifically line the pulp cavity.

**Hint**: Eliminate the incorrect options based on their functions: chondroblasts relate to cartilage, osteoblasts to bone, and ameloblasts to enamel.

### Final Answer:
The pulp cavity of teeth is lined by **odontoblasts**.