What is the Hardest Substance in the Human Body?
Tooth enamel – the top layer of the tooth – is the hardest substance in the human body. This thin layer is formed by special cells called adamantoblasts and covers the crown of the tooth. The enamel consists of fibrous prisms of the rare mineral hydroxyapatite. As the tooth matures, the enamel loses water and … What is the Hardest Substance in the Human Body?