HAIR STRUCTURE

HAIR FACTS

1. Human are covered all over with hair,except on the palms of hand,soles and lips.
2. Each person's head,carries about 1,00,000 - 150,000 hair follicles.
3. Baby's head have 1,100 follicles.
4. By age of 25 numbers gets reduced to 600 follicles.
5. By age of 30 - 50 it reduces to 250-300 follicles.
6. Hair characteristics are inherited from our parents.

HAIR DISTRIBUTION

Vellus : 1 cm long contains no pigments or very little pigments. Follicles producing them do not have sebaceous glands.

Lanugos : it develops on the fetus of 3 months. It sheds off a week before baby is due to be born. They are of same length, all over body.

Terminal : Long hair present on head and body. They are produced by follicles with sebaceous glands. Gradually these follicles become thinner and shorter in the people prone to baldness.

Composition of hair:
Hair is composed chiefly of the protein called Keratin which is found in all horny growths including the nails and skin.. The chemical composition of hair varies with its color. Darker hair has more carbon and less oxygen. The reverse is true for lighter hair.

Average hair is composed of:

Carbon -- 50.65%
Oxygen -- 20.85%
Nitrogen -- 17.14%
Hydrogen -- 6.36%
Sulphur -- 5.0%

Division of Hair

Full grown human hair is divided into two principal parts:

1. ROOTS

2. SHAFT
   Structure of Hair- Root

3. Hair Root: Hair root is the part of the hair structure located under the skin surface. This part of the hair is enclosed within the follicle.

4. Hair Shaft: Hair shaft is the part of the hair structure, extending above the skin surface.

The three main structure associated with the hair root are:

• The Follicle
• The Bulb
• The Papilla

Thank You for Reading My Blog Next Blog I'm about to share THE LAYER OF HAIR SHAFT.