Hair loss is experienced by all of us at one or the other time. To know the causes of hair fall, it is very essential to know the structure of hair and its normal growth cycle.
Structure of hair
The hair on our scalp can be divided into two parts, the root and shaft. The root part of hair is in the skin (epidermis) of scalp. The hair root is surrounded by a pouch like structure called follicle. The base of hair root is in the shape of a bulb. This bulb is indented by capillaries and nerve fibers. The cells in the center of bulb divide. The newly divided hair cells push the previous cells up. The cells which move upwards die slowly forming hard hair shaft.
The hair shaft has three layers the cuticle, medulla and cortex.
Cuticle is the outer layers and protects the inner layers. It is transparent. Healthy cuticle gives a shiny appearance for hair and unhealthy cuticle gives lifeless look
Medulla is the innermost layer composed of large cells.
Cortex is the layer between cuticle and medulla. This contains pigment and keratin. Cortex determines the bulk and strength of hair.
The hair follicle contains oil secreting glands which make...
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