The role of melanocytes and keratinocytes The hair cortex also contains melanin. Produced by specialized cells called melanocytes, melanin is the pigment responsible for hair color. Located near the hair bulb, melanocytes inject their pigments into the keratinocytes of the developing hair shaft.
Which part of the hair follicle is responsible for hair color?
The matrix is the part of the hair follicle where matrix keratinocytes proliferate to form the hair shaft of growing hair. Melanocytes are mixed amongst the matrix cells to provide the hair shaft with color.
Which layer does hair originate from?
Hair follicles originate in the first and second layers of your skin (epidermis and dermis). Follicles holding your terminal hair, or the hair that grows on your scalp, eyelashes and eyebrows, extend into the first and second layer of your skin and sometimes into the third layer (subcutaneous tissue).
What are the 3 layers of hair?
The hair shaft is formed of three layers:
- The medulla – the deepest layer of the hair shaft, only seen in large and thick hairs.
- The cortex – the middle layer of the hair shaft which provides the strength, colour and texture of a hair fibre.
- The cuticle – the outer layer of the hair shaft is thin and colourless.
What is the medulla layer of the hair?
The structure of human hair is well known: the medulla is a loosely packed, disordered region near the centre of the hair surrounded by the cortex, which contains the major part of the fibre mass, mainly consisting of keratin proteins and structural lipids.
What part of the hair gives the color?
Cortex The cortex is the main body of the hair shaft—it contains natural moisture and color pigment, which is visible through the translucent cuticle.