How many the hair of a 12 years old?

The average human head has about 100,000 to 150,000 hair follicles, and this number doesn't significantly change with age. A 12-year-old typically falls within this range, although individual factors like genetics, hair type, and health can influence the exact count. It's important to note that hair density can vary, but on average, a child of this age would have a similar number of hairs as an adult.