What is hair?

Hair is a protein filament that grows from follicles found in the dermis, or skin. Hair is one of the defining characteristics ofmammals. The human body, apart from areas of glabrous skin, is covered in follicles which produce thick terminal and finevellus hair. Most common interest in hair is focused on hair growth, hair types and hair care, but hair is also an importantbiomaterial primarily composed of protein, notably keratin. Attitudes towards hair, such as hairstyles and hair removal, vary widely across different cultures and historical periods, but it is often used to indicate a person’s personal beliefs or social position, such as their age, gender, or religion.