Based on the diagram drawn above in (i), give a suitable term for each of the following descriptions:
1. Exposed portion of tooth above the gums.
2. Hardest substance that covers the crown of the tooth
3. It carries the nerve fibre, blood vessels, and sensory cells.
4.Hard substance around the root that holds tooth in the socket in the jaw.
5. The narrow portion of the gum line.
6. A type of tooth used for tearing and piercing
7. Bicuspid tooth with one or two roots.

Explanation

### Step-by-Step Text Solution:

1. **Exposed portion of tooth above the gums**: The exposed part of the tooth that is visible above the gums is referred to as the **crown**.

2. **Hardest substance that covers the crown of the tooth**: The hardest substance that protects the crown of the tooth is called **enamel**.

3. **It carries the nerve fibre, blood vessels, and sensory cells**: The part of the tooth that contains nerve fibers, blood vessels, and sensory cells is known as the **pulp cavity**.

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