Final answer:
During your lifetime, you have two sets of teeth: baby teeth and permanent teeth. The baby teeth begin to appear at around 6 months of age and are replaced by permanent teeth between the ages of 6 and 12. The permanent teeth consist of 32 teeth.
Step-by-step explanation:
During your lifetime, you have two sets of teeth. The first set consists of 20 deciduous teeth, or baby teeth, which start to appear at around 6 months of age. These baby teeth are then replaced by a second set of teeth, called permanent teeth, which typically begin to emerge between the ages of 6 and 12. The permanent teeth consist of 32 teeth, including 8 incisors, 4 canines, 8 premolars, and 12 molars.