Hair grows from the follicle, a little sac-like hole in the skin that contains special cells that produce and reproduce new hairs. The follicle is located in the deep dermis of the skin, and it’s filled with blood vessels. These vessels provide nourishment to the hair cells, as well as hormones that stimulate them to form new cells.
Once the new cells have formed at the base of the follicle, they move upward through the dermis. When they reach the surface, they die. The dead cells are then replaced by the keratin that forms the shaft of the hair.
The strands of hair are made up of three different parts: the cuticle, the cortex and the medulla. Each of these layers plays an important role in the structure of your hair.
Cuticle: The outermost layer of the strands, the cuticle is a translucent barrier that protects the hair from the outside world. Its surface is a slick, shiny surface that’s slippery enough to prevent dirt and water from penetrating it. It also helps prevent your hair from breaking.
Cortex: The central portion of your strands, the cortex is the part that holds your hair together and gives it its strength. It’s composed of long proteins that twist like a telephone cord, making it elastic.
Each of these protein strands is linked to other strands by a layer of intercellular cement that’s rich in lipids and proteins. It’s the most essential component of your hair.
Underneath the cuticle is the cortex, a network of coiled proteins that’s also elastic and gives your hair its flexibility. The cortex also holds the pigments that give your hair its color — a pigment called melanin. Melanin is produced by specialized cells in your hair follicles, near the bulb.
It also gives your hair its texture, which depends on the shape of your follicles and how they’re made. Circular follicles produce straight hair, while oval follicles create curly or wavy strands.
The cortex is home to melanocytes, which produce melanin, the pigment that gives your hair its color. When melanocytes inject their pigment into keratinocytes of the developing hair shaft, it causes them to change color, which is what gives your hair its unique hue.
There are two types of melanin, eumelanin and pheomelanin. Depending on the type of melanin, your hair can have an array of colors.
When your hair is long, it can take up a lot of space in your scalp and on the rest of your body. It’s important to keep it trimmed regularly. Trimming will help keep your hair from looking drab and it will also make it easier to style.
Whether you have short, medium, or long hair, you’ll want to make sure it stays healthy and shiny. Using the right shampoo is the key to keeping your strands nourished and your scalp clean and healthy.
The best shampoo for your hair type will depend on your specific needs and goals, so it’s a good idea to talk to your stylist about what you’re trying to achieve. Your stylist can recommend a shampoo that will suit your hair’s needs and can be used on a daily basis.