Narrow extensions of the pup cavity are called

Options

A. root canals
B. apical foramina
C. canaliculi
D. trabeculae

Answer

**Step-by-Step Solution:**

1. **Understanding the Structure of a Tooth**:
- A human tooth is divided into three main parts: the crown, neck, and root.
- The crown is the visible part of the tooth above the gum line, the neck is the part that is at the gum line, and the root is embedded in the jawbone.

2. **Identifying the Pulp Cavity**:
- Inside the tooth, there is a central space known as the pulp cavity.
- The pulp cavity contains nerves and blood vessels that are essential for the tooth's health and sensory functions.

3. **Recognizing the Extensions of the Pulp Cavity**:
- The question specifically asks about the "narrow extensions" of the pulp cavity.
- These extensions are thin pathways that allow for the passage of nerves and blood vessels.

4. **Naming the Narrow Extensions**:
- The narrow extensions of the pulp cavity are known as the **root canals**.
- Each tooth has one or more root canals that extend from the pulp cavity down through the root of the tooth.

5. **Function of the Root Canals**:
- Root canals serve as conduits for nerves and blood vessels to enter the pulp cavity.
- They play a crucial role in the tooth's vitality by providing necessary nutrients and sensory functions.

6. **Conclusion**:
- Therefore, the answer to the question is that the narrow extensions of the pulp cavity are called **root canals**.

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