Understanding the hair and structure of human hair
a. Understanding the hair
(structure of human hair ) – Hair or often also called fur is an organ like a thread that grows on the skin of animals and humans, especially mammals. Hair appears from the epidermal layer (outer skin). Even though it comes from hair follicles that are far below the dermis. whereas in plants it is called a trichome, which is a hairlike structure.
There are several kinds of human hair colors. But the natural color in human hair is quite divided into 6 major groups: black, brown, blonde, auburn, red, and gray-white. Auburn means reddish brown. Whereas for gray-white hair color is only found in older people, albino people, and in some cases tyrosine deficiency.
Our hair at first is white, this color of hair color appears because humans have pigments. and there are 2 kinds of pigments that regulate hair color, namely eumelanin, and pheomelanin (the Latin term: phaeomelanin, meaning gray melanin).
Melanin is a dark brown pigment, which regulates a variety of “biological” colors in humans. Starting from the color of the skin, the color of the iris, to the color of the hair.
Whereas what happens to albino people is deficient in melanin which is quite heavy, so it is almost no melanin at all on the skin.
Pigment cells called melanocytes produce this melanin pigment in the hair. Melanin starts its function from birth and our hair color depends on the distribution of melanin.
When these melanocyte cells stop producing or reducing melanin production, this will affect the color of the hair and turn it gray. So gray/gray hair basically depends on everyone’s “melanocytes clock”.
As we know this melanin production gradually decreases and that is the reason why gray hair is associated with aging. But there are some things that can affect this such as:
There are several internal factors and also external factors, for example, internal factors in the human body such as hormones, genetics, lack of nutrients, while external factors are climate, pollution, and toxins.
B. Hair Structure
1. follicles or hair roots or
(structure of human hair ) – Follicles or hair roots are parts of the hair that are embedded in human or animal skin. The follicle is divided into 5 parts, namely:
The bulb is the enlarged part of the hair, the bulb is shaped like a ball, the point is to protect the hair papilla
Papillary hair is a protected part of the bulb which is located at the bottom of the hair follicle. Papil hair comes from skin cells hides (corium) and the epidermis (epidermis).
Melanocytes are pigment-producing cells or hair coloring agents that will be spread mainly into the context, then into the hair medulla. This melanocyte is located between papillary cells.
The hair follicle is the hair follicle and is where the hair grows. This hair bag consists of 2 layers, namely the outer layer and the inner layer. The inner layer comes from epidermal cells, while the outer layer comes from the dermis cells.
Muscle enforcer hair is a muscle that makes fine hair like Rome hair stand when receiving stimuli from the outside and from inside the body such as feeling cold, hot, warm.
The Matrix also called the hair bulb, is the most fertile part of hair growth.
2. Hair shaft layer
The hair shaft is divided into 3 parts, namely:
Cuticula membrane is a layer of the hair shaft that looks like fish scales and serves to protect the hair layer. This layer is the outermost which is the hair and head protector.
Cortex or hair epidermis is the largest part of the hair and is a layer below the cuticle that functions as a layer that determines the color because this layer contains a lot of pigments or hair dyes.
Medulla or marrow hair. This medulla is located at the very center of the hair shaft. (structure of human hair )
3. Hair Shape
Regarding the structure, the hair forms can be grouped as follows:
a. Straight, not wavy and not curly. Usually, straight hair can provide some comfort to the wearer, for example in terms of hair, both cut and bun.
b. Wavy is to show large bubbles in the hair. This is because the follicle is curved and has an oblong cross-section. This type of hair is easy in terms of the arrangement, either a bun or short cut.
c. Curly hair shape, usually this type of hair is in the form of small or medium waves. This is because the follicles are very curved while the cross section is flat. Maybe in hair styling, this type of hair is a bit complicated and has a little hairstyle too.