What Is Hair?

Hair is fibre, and it is a lot like wool. Every hair has three layers. The first and inner most layer of fibres are the medulla. The second layer is the cortex that is around the medulla, and the outer most layer is called the cuticle and it protects the other sensitive layers underneath from breakage or damage. Each hair grows around 0,653cm each month out of the follicles in our heads and it may keep growing for up to 6 years until it falls out and there is space for new hair to grow. The length of your hair depends on how long it grows for. If it only grows for less years than the average growth period of six years, it will be shorter. The thickness of your hair depends on the wideness of you hair

The skin is divided into three different parts including the epidermis, dermis, and hypodermis. The epidermis is the outermost layer of the skin. This region of the skin has no blood cells or blood vessels running through it. All of the nutrients that the epidermis needs are received through diffusion from the dermis. The epidermis is made up of stratified squamous epithelial cells. The epidermis is made of five separate layers: the stratum basale, stratum spinosum, stratum granulosum, stratum lucidum, and the stratum corneum. Starting at the innermost layer, the stratum basale is where mitosis of keratinocytes takes place. This layer of the epidermis also contains melanocytes which give the skin it’s pigment. As mitosis takes place in the stratum

Hair: composed of columns of dead, keratinized cells bound together by extracellular proteins. Hair has two main sections: The shaft- superficial portion that extends out of the skin and the root- portion that penetrates into the dermis. Surrounding the root of the hair is the hair follicle. At the base of the hair follicle is an onion-shaped structure called the bulb Papilla of the hair and the matrix within the bulb

In addition, more attention is paid to the front hairline (often thought to be the most important part of a hair system).

The melanocytes synthesize melanin (dark brown/reddish pigment). They are in the deepest layer of the epidermis, the stratum basale. The melanocytes are located on the superficial part of the nucleus of the keratinocytes. The help protect the keratinocytes and the rest of the cells by shielding and absorbing the UV radiation, forming the color. For those who have darker skin there is more melanin produced from these melanocytes. The melanosomes (granules) which are transported along the actin filaments is where the melanin accumulates.

The highly regulated process of epidermal keratinization is the result of differential expression of within the epidermis. Basal keratinocytes express intermediate filament keratins 5 and 14. Suprabasal keratinocytes express keratins 1 and 10, which comprises approximately 85% of total proteins found in fully differentiated keratinocytes. Types I & II intermediate filaments (keratins) (Figure 3) are composed of three domains: (1) a central alpha-helical rod domain, (2) an amino-terminal head, and (3) a carboxyl-terminal tail domain both the head and tail globular domains contain end, variable, and homologous subdomains. The central α-helical domain is approximately 330 amino acids long and is divided into four subdomains (1A, 1B, 2A, and

Children The Information Hair Loss - Adult Style.National Alopecia Areata Foundation, alopecia is a common disease is usually diagnosed in childhood reports. Children's Alopecia Project, according to cheap lace wigs to make hair loss is caused by the rapidly growing white blood cells attacking the hair follicles. Does not attack the root of the follicle is the supply of new cells, which means that the growth potential of the

up of dead cells that turned into keratin. The hair shaft formed of three layers which are the

It was found that many animal species had the ability to regenerate hair cells in the inner ear, except mammals. Mammals were shown to have very limited hair cell regeneration, mainly in the auditory epithelium. It was believed that hair cells in birds arose from adjacent supporting cells. For hair cells to regenerate, it was believed that supporting cells reentered mitosis, formed daughter cells that then differentiated into either hair cells or more supporting cells, and in doing this it would restore function and structure to the inner ear epithelium. However, it was found that in avian species this was not the case. Remarkably after further analysis, in many avian species, supporting cells actually go through a process of direct differentiation. This is when the supporting cells themselves actually change their gene expression and convert into hair cells without dividing. There was no literature if there were changes in signaling but it would be possible since the cells would have to have some notification in which to transdifferentiate. This has been studied in chicken auditory epithelium. The studies show that the different mechanism is unique in its spatial and temporal patterns which suggest that the cells are being differentially regulated. Direct differentiation is a possible route of new hair cell development that was already discussed previously in the

A persons hair contains their DNA. Also there are several different parts of a persons piece of hair. Some different parts of hair are the root, cuticle, cortex, shaft, and medulla. I know you all are probably wondering what exactly are these different parts of the hair. Well the root is the part of the hair that’s

As we discussed in the Get to Know Your Hair section, if your hair’s cuticle is damaged it will not lie flat, so hair will appear dull. The flatter the cuticle scale, the more light is easily reflected off of its surface causing the hair to have natural shine. Damaged hair has less natural shine. Damage to the cuticle will also cause hair to not have natural movement and body, so the hair appears lifeless and stiff.

small comb with shallow teeth is used with your thumb to pull out the hairs. Do not twist or pull

These cortex cells multiply and as they increase in number, the new ones fashioned push the historical ones upward in the direction of the skin of the scalp. Because the cells technique the outside, they harden and become keratinized and then die. Accordingly, what you see as your hair is a mixture of useless keratinized

Your skin has two layers. The outer layer is called your epidermis. It's made up of epithelial cells. The main purpose of your epidermis is to protect your body from germs and from getting injured. If we didn't have an epidermis, we'd be sick all the time, and any little cut would hurt extremely bad. On

Long ago in Ancient Greece there was a little town called Oldiron. This little town was ruled by King Alexandros the great. He was known for his heroic feats of courage and bravery. He had fought ferocious centaurs, women disguised as snakes, blood-thirsty vampires, fire-breathing dragons and many creatures considered impossible to defeat. There was one mythical creature that was really quite a headache to get rid of. This monster was Morpheus.