Match the words with the definitions.

Write the number of the definition near the word.

Mouth [ ]

Root [ ]

Dentine [ ]

Permanent tooth [ ]

1. The part of a hair, tooth, or nail that is under the skin.

2. The opening in the face of a person or animal, consisting of the lips and the space between them.

3. A hard substance containing calcium that forms the main part of a tooth.

4. One of 32 adult human teeth that replace milk teeth.