Do both eggshells and tooth enamels have calcium phosphate?

Yes, both eggshells and tooth enamels have calcium phosphate.

Eggshells are primarily composed of calcium carbonate, but they also contain a small amount of calcium phosphate. The calcium phosphate in eggshells is in the form of hydroxyapatite, which is the same mineral that makes up the majority of tooth enamel.

Tooth enamel is the hardest tissue in the human body, and it is composed of about 96% hydroxyapatite. The hydroxyapatite in tooth enamel is arranged in a very dense and organized structure, which gives it its strength and durability.

The presence of calcium phosphate in both eggshells and tooth enamels is essential for their function. In eggshells, the calcium phosphate helps to strengthen the shell and protect the egg from damage. In tooth enamel, the calcium phosphate helps to protect the teeth from wear and tear, and it also helps to prevent cavities.