What kind of hairs do you have?

-

The skin Adnexa
Hair
Nail
Sweat gland
sebaceous gland


Hair
The types of hairs
Lanugo hairs
Hairs are soft and thin. They only happened to the newborn baby. 
Vellus hairs
They are only 1-2cm height without melanin.
They don’t have sebaceous gland and won’t excrete lipid.
Terminal hairs
They are coarse and long hairs with glands. Especially on head, arm, and leg.    


Hair
Hairs have their life. They continue to grow, fall off, and new born. It can be defined to 3 periods. They are Anagen, Catagen, and Telogen. It falls off 70-120 hairs every day.

Dermal papilla
It is the recess of hair bulb. There are cells next to edge to get the nutrition from blood capillaries. The cell divisions will become new hairs. If cells are damaged, the hairs won’t grow any more.  

---------------------------------------------------------------------------------------------------------
help to find the specific skincare product ingredients by "skin+" App













Comments

Post a Comment

Popular posts from this blog

ITA0 (individual typology angle)

-
Image
ITA 0 (individual typology angle) (Wikipedia, color space conversions, Adrian Ford and Alan Roberts, Aug.11, 1998) ITA values were calculated from spectrocolorimeter (Datacolor) mea­surements of the L* (Luminance) and b* (yellow/blue component) parameters. This value is based on CIELab of the CIE system. The CIE has defined a system that classifies color according to the HVS (the human visual system). This system is called color space which is in combination with physical device profiling, it allows for reproducible representations of color, in both   analog   and   digital   representations. A color is thus usually specified using three co-ordinates, or parameters. These parameters describe the position of the color within the color space being used. They do not tell us what the color is, that depends on what color space is being used. There are more than one color spaces for the applications. This is because different color spaces are better for different applications, for
Read more

skin color type_ITA

-
Image
skin color type_ITA There are many methods to detect the skin health, skin surface properties, skin color, skin color type, and hair conditions. They are non-intrusive. The following is the method to figure out the skin color type.  Skin color type 1.    Fizpatrick skin types Questionnaire designed by Dr. Thomas B. Fitpatrick in 1975. Fizpatrick skin types Type I       Celtic type                   0-150 Type II.    Caucasian white          50-250 Type III    Mixed type                 100-350 Type IV    Mediterranean type    150-500 Type V     Asian/ Indian skin      150-650 Type VI    Black skin                  600-999 2.    ITA 0 (individual typology angle) calculation CIE colorimetry =[Arc Tangent ((L*-50)/b*)] x 180/ π Very light                  ITA 0  > 55 0 Light                 40 0 < ITA 0 <55 0 Intermediate      28 0 < ITA 0 <41 0 Tan/matt            10 0 < ITA 0 <28 0 Brown              -30 0 < ITA
Read more

The nail structure

-
Image
The skin Adnexa Hair Nail Sweat gland sebaceous gland   nail structure nail matrix, nail root, proximal matrix, nail plate matrix nail plate, nail body nail bed, distal matrix, nail bed matrix white lunula proximal nail fold eponychium, cuticle hyponychium  Nail has similar function of the   Stratum corneum in skin. Because this part does't have  Melanocyte  i n stratum basale, the nail is transparent. The nail care is like the skin care should to prevent damage the  Cormeocyte which is appearance of nail. As it is damaged, It will lose the protection and need   more time to recover than skin. ----------------------------------------------------------------------------------------------------------- help to find the specific skincare product ingredients by "skin+" App
Read more