A tooth is a hard, calcified structure found in the mouths of many animals, including humans. It is primarily used for biting and chewing food. Teeth are made up of different parts, including enamel, dentin, and pulp, each serving a specific function. Humans typically have two sets of teeth in their lifetime: primary teeth, also known as baby teeth, and permanent teeth. Teeth come in various shapes and sizes, each designed for specific tasks. For example, incisors are sharp and used for cutting, while molars are flat and ideal for grinding food. Proper dental care is essential for maintaining healthy teeth and preventing issues like cavities and gum disease.