Why our hair grows a lot more than the hairs in the rest of the body?

Question: Why our hair grows a lot more than the hairs in the rest of the body?
- Keywords:
  body,
  grow,
  hair
Asked by Sofia Masiello to Carmen, Steph on 20 Mar 2015.
- Stephanie Dyson answered on 20 Mar 2015:
  
  The length that hair can grow to is controlled by the length of a certain part of the hair follicle called anagen phase. The hair on your head has a much longer anagen phase than anywhere else on the body and that is why it grows longer.
  
  Steph

Question: Why our hair grows a lot more than the hairs in the rest of the body?