Question

The hardest substance in the human body is

• A. Dentine
• B. Enamel
• C. Collagen
• D. Melanin

Answer 1

The correct option is B

Enamel

The correct option is B.

Explanation for the correct option:

1. Teeth are the hardest substance in the human body.
2. The enamel on the teeth is the hardest and most highly mineralized substance in your body.
3. It is mainly composed of calcium phosphate.
4. It covers the outer layer of each tooth and it is the most visible part of the tooth.

Explanation for the incorrect options:

Option A:

The second-hardest tissue in the body, after enamel, is dentine, which serves as the tooth's primary support structure.

Option C:

1. Glycine, Proline, Hydroxyproline, and Arginine are particular amino acids found in collagen.
2. Healthy joints and skin elasticity, or stretchiness, are both attributed to the protein collagen.

Option D:

1. The body contains melanin, which is responsible for the color of your hair, eyes, and skin.
2. Skin, hair, and eyes will all be darker the more melanin creates.

Final answer: The hardest substance in the human body is enamel.