Anagen : Anagen is the active growth stage of hair. During the anagen stage the hair contain it’s highest amount of melanin. This stage is lasts between 3-6 years. Catagen: Catagen is a transition stage in which the hair stops growing but the hair is not shed. During this stage the follicle is being reabsorbed . This stage lasts 2-3 weeks. Telogen: Telegen is a resting stage during which the follicle receds and the hair begin to fall in preparation for the development of new hair. This stage lasts between 6-8 weeks. Anagen: The hair growth cycle continues as anagen begins again. The old hair has shed and a new follicle has formed. A new hair begins growing to replace the hair that was shed.

1. Hair Structure
And
Hair Growth
Cycle
Prepared by: Ms. Kajal Pradhan
Assistant professor
M.Pharm. (Pharmaceutics)

2. STRUCTURE OF HAIR

4. LAYERS OF HAIR
1.) Cuticle:
 Translucent outer layer, which protect the hair.
 Flat cells layered in an overlapping formation that looks like
shingles on a roof

5. LAYERS OF HAIR

6. 2.) cortex:
 Middle layer made up of long thin cells firmly attached to each
other are arranged lengthwise.
 Location where creates natural hair colouring, a substance called
melanin.
 Provides hair strength, elasticity and determines the texture and
quality of hair.
.3.) Medulla:
 Central core of the hair.
 Composed of soft keratin.

7. Hair Growth Cycle

8. Stages of Hair Growth cycle
1.) Anagen :
 Anagen is the active growth stage of hair.
 During the anagen stage the hair contain it’s highest amount of
melanin.
 This stage is lasts between 3-6 years.
2.) Catagen:
 Catagen is a transition stage in which the hair stops growing but
the hair is not shed.

9.  During this stage the follicle is being reabsorbed .
 This stage lasts 2-3 weeks.
3.)Telogen:
 Telegen is a resting stage during which the follicle receds and the
hair begin to fall in preparation for the development of new hair.
 This stage lasts between 6-8 weeks.
4.) Anagen:
 The hair growth cycle continues as anagen begins again.
 The old hair has shed and a new follicle has formed.
 A new hair begins growing to replace the hair that was shed.