Final answer:
The primary dentition consists of 20 deciduous teeth that are eventually replaced by permanent teeth. They serve important functions and have different types for biting, tearing, and grinding food.
Step-by-step explanation:
The primary dentition, also known as the baby or deciduous teeth, is unique because it consists of 20 teeth that are eventually replaced by the permanent teeth. The primary dentition plays an important role in the development of speech, proper chewing, and maintaining space for the permanent teeth to erupt. These teeth have different types, such as incisors, canines, premolars, and molars, each serving a specific function in biting, tearing, and grinding food.