i have a black hair, it  is a protein filament that grows from follicles found in the dermis.
Where did you get the product? Or is it something your made on your own?
it is one of the defining characteristics of mammals.
Oh I see. What other characteristics define mammals?
another is the human body, apart from areas of glabrous skin
I've never heard of glabrous skin. What is that?
it  covered in follicles which produce thick terminal and fine vellus hair
Interesting! Do the different hair types all have glabrous skin, or only certain types?