The Cuticle is formed of dead cells and also gives the hair shaft strength and provides protection for the softer inner structures, Keratin gives the Cortex its elasticity and high tensile strength., The Medulla structure consists of sparse cells and air bubbles, The Medullas role In humans is unknown however in animals helps to regulate and control its body temperature., The Cortex is the fibrous middle layer of the hair shaft, keratin-filled elongated cells that are cemented together with lipid rich flexible keratin., The medulla is the innermost layer of the hair structure., The Cortex contains the pigment (Melanin) that gives the hair its colour., Cuticles can be damaged by excessive heat, chemicals (colouring), everyday elements such as the sun, wind, brushing and harsh handling., The Cuticle is the outer layer of the hair shaft, consisting of scale-like overlapping cells.,

Hair Structure

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