Human teeth are hard structures located in the mouth, essential for biting and chewing food. They are made of enamel, dentin, and pulp, with enamel being the hardest substance in the body. There are four types of teeth: incisors, canines, premolars, and molars, each serving a specific function in the digestive process. Adults typically have 32 teeth, while children have 20 primary teeth that eventually fall out. Proper dental hygiene, including brushing and flossing, is crucial for maintaining healthy teeth and preventing issues like cavities and gum disease. Regular visits to a dentist are also important for oral health.