What is enamel?
Enamel is a part of a crown of a tooth. (1)
Tooth enamel is a type of tissue. (2)
The enamel is the outermost layer of a tooth. (1)
Enamel is the hardest tissue in the body. (1)

Calcium hardens the tooth enamel. (2)

What does enamel do?
helps to protect teeth from bacteria (1)
provides strength so the teeth can withstand pressure from chewing (1)

What does enamel contain?
hydroxyapatite

What does enamel NOT contain?
blood vessels (2)
nerves (2)
cells (2)

Resources
1. https://www.healthline.com/health/tooth-anatomy#structure-and-function
2. https://en.wikipedia.org/wiki/Tooth_enamel

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