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Hair Structure
And
Hair Growth
Cycle
Prepared by: Ms. Kajal Pradhan
Assistant professor
M.Pharm. (Pharmaceutics)
STRUCTURE OF HAIR
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
LAYERS OF HAIR
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.
Hair Growth Cycle
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.
 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.
Hair sturcture and hair cycle

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Hair sturcture and hair cycle

  • 1. Hair Structure And Hair Growth Cycle Prepared by: Ms. Kajal Pradhan Assistant professor M.Pharm. (Pharmaceutics)
  • 3.
  • 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
  • 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.
  • 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.