Your hair is the collective term for the strands of protein filaments that grow from the scalp, forming the hairy covering on the human head. Hair is primarily composed of a protein called keratin and is composed of three layers: the cuticle, Cortex, and Medulla.
Hair plays a significant role in human appearance, personal expression, and cultural identity. It provides insulation, protects the scalp from sun damage, and functions as a sensory organ, helping detect environmental stimuli like touch or temperature changes. Historically, hair has been used as a form of adornment, with various hairstyles and treatments emerging throughout different cultures and periods.