On average human hair grows at around 1.25 centimeters (0.5 inches) a month, that is around 15 centimeters (6 inches) a year.
The movements of hair strands are used in our sense of touch, as disturbances to a person's hair will send signals through the follicles to the nerve receptors.
Other types of hair such as the eyelashes, are sensitive to harmful materials and are used to protect the eyes from dirt and sweat.
Anagen - The formation of hairs through cells dividing in the Papilla.
Catagen - A transitional phase allowing the follicle to renew itself.
Telogen - A period of 1-4 months where the follicle and hair will remain dormant.
Not all hair strands go through these stages simultaneously, they happen at different periods in order to allow hair growth to appear constant. For example, as one strand of hair completes the Anagen phase, another may be beginning the Telogen phase.
- What is hair?
The movements of hair strands are used in our sense of touch, as disturbances to a person's hair will send signals through the follicles to the nerve receptors.
Other types of hair such as the eyelashes, are sensitive to harmful materials and are used to protect the eyes from dirt and sweat.
- Growth
Anagen - The formation of hairs through cells dividing in the Papilla.
Catagen - A transitional phase allowing the follicle to renew itself.
Telogen - A period of 1-4 months where the follicle and hair will remain dormant.
Not all hair strands go through these stages simultaneously, they happen at different periods in order to allow hair growth to appear constant. For example, as one strand of hair completes the Anagen phase, another may be beginning the Telogen phase.
