It’s just our hair? But how much can you really know about it? Below are ten things you probably didn’t know about hair. Hair is characteristic of the individual species and is composed mainly of a protein, keratin (97 percent ), but also fatty acids, melanin, zinc, iron and vitamins.
What is hair?
A hair is composed of a visible part, the stem, and a root buried in a small cavity, the hair follicle.
The stem consists of three layers: the marrow, surrounded by the cortex, itself wrapped by the cuticle. The latter consists of a single layer of cells arranged like tiles on a roof: this arrangement permits the separation of their hairs, which prevents them from becoming entangled. The cuticle is the area that contains the most keratin.
The origin is implanted obliquely under the epidermis, embedded in the hair follicle. It’s at this level that the exchanges of oxygen and nutrients essential for the growth of the hair take place and that is the sebaceous gland, secretion of sebum for the lubrication of their hair.
How fast does hair grow?
The hair grows an average of 0.3 millimeters a day, barely 1 centimeter a month.
This is an average and the hair doesn’t grow at the same rate for everyone.
Additionally, Asian hair grows faster than those of Westerners and much less quickly than African American hair.
Can our hair betray us?
Your hair can tell everything that’s been in your blood recently.
Moreover, it is a material incapable of sterile (thanks to hair, we can find traces of drugs in a 4 000 year-old mummy).
Really, unlike blood, the hair keeps in memory that the toxicological and meals behaviors of an individual: 6 cm of hair can return about 6 weeks in time.
How long can a hair live?
The average life span of a hair is just 5 years.
In a life, every hair follicle generates about 15 hairs and undergoes about twenty five cycles. These occur in 3 stages:
- The anagen phase. It is the growth phase. In this time, which lasts two to five years, the hair bulb is at the bottom of the epidermis and stays there until another phase. 85 percent of the hair is at this stage of evolution.
- The catagen phase lasts 2-3 weeks and will allow the hair to get ready for the rest period. Approximately 3% of the hair is at the same time at the conclusion of generation through which the follicle narrows significantly.
- The telogen phase is the resting phase: the hair does not grow, but it stays attached to its follicle while its bulb is at the base of the epidermis. At the conclusion of this 6 to 7 month period, the old hair falls under the strain of a new one. About 12% of the hair is at rest.
Red, brown, blonde, do most of us have exactly the same amount of hair?
People with brown or reddish hair have less hair than individuals with blonde hair.
Really, a brunette has roughly 100,000 hair as a blond has about 150,000.
How much hair is lost every day?
Hair loss is a natural phenomenon and a individual loses on average between 45 and 60 hairs each day.
The rate of loss accelerates in the early fall and sometimes early spring and may reach 100 hairs per day.
Past 100 hairs per day or two months of fall, it is considered pathological, it is crucial to consult a physician.
Is food important for our hair?
What you eat affects your hair and nutritional deficiencies can impact the health of your hair.
For example, a deficiency of iron, folic acid (vitamin B9), zinc or sulfur-containing amino acids can lead to hair loss.
Why is it that hair eliminate colour?
The exact mechanics involved in the development of canities (that the hair thinning ) aren’t yet fully understood. Regardless, it is known that cells known as melanocytes make pigments they move to other cells, the keratinocytes.
If the hair loses its color, it is because this transfer of pigment no more intervenes. Likely because there would just be no longer melanocytes after a time.
This disappearance would be programmed by a biological clock specific to every and every one. But inflammatory responses, responsible for aging cells and due to strain and normal operation of the body also play a role in the overall look of white hair.
Why do we lose our hair?
Various causes may cause alopecia (losing hair totally or partly and sometimes irreversibly).
Girls are not as likely to suffer from baldness. At the age of 30, it affects 2% to 5% of them and almost 40% at the age of 70.
Heredity appears to have a major influence in the appearance of alopecia.
More infrequently, alopecia may be a result of not having hair roots or an abnormality of the hair shaft.
How much weight could our hair hold?
A mind of 100,000 strands of hair may theoretically take several tons!
Theoretically, first because some hair is not as resistant than others and since it assumes that the hair is no more connected to the scalp!
It’s the keratin, the major section of your hair, that gives this fantastic strength.