Why do we have hair and nails?
Correspondingly, where do our nails and hair come from?
Like hair and nails, they are derived from the epidermis. They are coiled glands that lie in the dermis, with the duct opening to a pore on the skin surface, where the sweat is released (although some may open into hair follicles, like sebaceous glands).
Likewise, are hair and fingernails made from the same thing? Fingernails are made from a tough protein called keratin. (Primates aren't the only animals that have found a use for keratin; hooves, horns and claws are also made from this substance.) Keratin gives hair and the outer layer of skin its strength. Instead, they are the result of your hurting the nail.
Also know, why do nails and hair grow?
As the epithelial cells within the follicle and matrix multiply, the older cells are pushed out, upwards through your skin. They die and harden, thus turning into hair or nails. This process, called keratinisation, makes your hair and nails grow.
What is the purpose of your hair?
While humans have developed clothing and other means of keeping warm, the hair found on the head serves primarily as a source of heat insulation and cooling (when sweat evaporates from soaked hair) as well as protection from ultra-violet radiation exposure. The function of hair in other locations is debated.