+Hair is a protein filament growing from [follicles](/wiki/follicle) in the [skin](/wiki/skin) of mammals. It offers insulation, sensory input, and protection, playing a significant role in individual identity and social expression. Composed primarily of keratin, hair continually grows and renews.
+## See also
+- [Hair Care](/wiki/hair_care)
+- [Human Biology](/wiki/human_biology)
+- [Body Hair](/wiki/body_hair)