You know your hair do

People often say: "Half of a woman's hair." Indeed, women have a hair can add unlimited charm and charisma. You know your hair?

Hair can not only protect the head, the head from wind, sun, rain and other injuries, but also conducive to human beauty. Although very fine hair, but its structure is very complex. Exposed portion of the hair above is called the hair shaft, part of the hair follicle called below the lower end of the hair follicle, spherical enlargement, called the hair Hair Extensions bulb, is hair growing point. The lower half of the hair bulb, with a recess, inside contains connective tissue, blood vessels and nerves, called the dermal papilla, hair nutrient supply is responsible.

Hair activity by sympathetic innervation, vertical hair muscle contraction sympathetic nerve activity, so MAO onwards, while oppression sebaceous glands secrete sebum. Normal adults, the hair is about 100,000 ~ 150,000. Hair daily average of 0.32 to 0.35 mm long, usually at night than during the day, grow faster in summer than in winter, daily to hair loss and even hundreds of dozens root root, but continue to grow. Approximately every five years to be replaced once the hair.

Hair contains iron, lead, zinc, coffee, copper, nickel and other trace elements, different races, different people's hair form, is not the same number of elements contained. Black hair more zinc, copper red brown hair, iron, cobalt is more, when the increase in hair nickel element content, the hair will become gray, golden hair containing titanium and more, brown hair containing cobalt and more.

Hair, hair can be divided according to their physical characteristics of steel hair, soft hair, hair oil, sofa, curls five. Steel made ??relatively hard, dense growth, water content also more flexible, elastic stable. Cotton hair is relatively soft hair, lack of hardness, less flexible. Oil hair grease more elastic strong, strong resistance elastic instability. Sofa lack of fat, less water content. Curved tufted hair, soft as wool. Because of different health status, condition and maintenance of state secretion, but also the hair is divided into: Neutral hair, dry hair, oily hair, and damaged hair.

From the form of the hair, the general living in temperate, subtropical yellow mostly straight hair, black people living in the tropics, mostly spiral curls, wavy and mostly white.

Hair color, brittle, thin dense growth of the extent and speed can reflect a person's physical condition, if the body is healthy, the hair cells containing pigment, less bubbles, hair Pre Bonded Nail Hair grows lush, dense, black, shiny, there elasticity, toughness, the growth rate is relatively fast; less if frail pigment contained in the hair cells, bubbles and more, so the hair yellow, sparse, fragile, dull, easy to fall off, the growth rate is very slow.

Mental status and nutritional status and hair growth are closely related and often irritability, depression, anxiety and malnourished people, the hair will be suffering from malnutrition, and even cause hair prematurely white or off. Therefore, only by understanding the physiology of hair, in order to better protect the hair.