What are the differences between eggshells and teeth?

Eggshells and teeth differ in composition and structure. Eggshells are primarily made of calcium carbonate, providing a protective barrier for the developing embryo, while teeth are composed of enamel, dentin, and cementum, making them strong and durable for chewing. Additionally, eggshells are relatively thin and porous, allowing for gas exchange, whereas teeth are dense and designed to withstand mechanical forces during biting and chewing. Functionally, eggshells protect and nurture, while teeth help in the mechanical digestion of food.