1. How does hair grow?

2. Is hair dead or alive
Is hair dead or alive, a lot of people ask that but the truth is that hair is dead and that is why it doesn't hurt when you cut it, but the reason it does hurt when you pull it is because your also pulling the stem and that is where the hair grows from.

11. What is hair?

13. The papilla is a very important part of your head, it is at the very bottom that helps the hair grow because it contains the blood supply.

15. Different types of hair
why is hair curly or straight?