That the treatment was clear and, as a result, effective,
should be clear about the structure of the hair and the most important principles
their development and growth.
Human hair is divided into three types – and they are all present
on the body. It:
- Pushkovye – thin, soft, often
colorless. They can grow not only on the head, but on the face, hands, everything
tele – and at the same time practically not noticeable.
- Long – thicker and tighter.
It is such hair that forms the visible part of the hair, and on various
parts of the body appear at puberty.
- Bristly– thinner long, short
and smooth. This is the type of hair
forming eyebrows and eyelashes.
It should be noted that the structure and life cycle of the formations of all
The above types are about the same. It should be highlighted
the most important components of the hair:
Hair bulb (follicle) – the most important part
structures.
Located in the deepest layer of the skin, which is called
hypodermis. Normally acting follicle consists of three
elements: pores (mouth), from which the hair shaft comes out,
the inner shell of the root and cuticle, ensuring reliable
hair fastening in the skin. Bulb size – 3-4 millimeters, and their
the number ranges from 100 to 150 thousand.
The papilla is a microscopic organ in
base follicle.
It plays an important role in the growth and nutrition of hair. Whole hypodermis
permeated with a frequent network of blood vessels, with each
papilla fits at least one capillary. In normal
functioning this part of the hair is constantly filled with blood, from
which take substances for the synthesis of keratin – a protein that is
main building material for the rod. Its cells are formed
continuously, with the result that the length of the hair increases, and through
the mouth he gradually moves outward. It is noteworthy that the hair
the core consists of 97% keratin, the rest –
amino acids and essential trace elements and minerals.
The rod is the visible part, which
directly forms the very head of hair. This is one of
the most complex elements. It consists of three layers.
- The first – the cuticle formed
dense, overlying each other scales. Under the influence
different chemical compositions, they can change color, unfold
or smooth out – this is precisely the reason for creating volume at
applying a conditioner, the formation of a new shade after
dyeing or straightening during ironing. When cuticle
can not close normally, talking about damage to the hair. - The second layer is | cortical (cortex).
Responsible for the elasticity and thickness of the hair, and also stores
natural pigment that gives hair color from birth. - Third layer – medulla
(medulla) Consists of round cells, on the number
which depends on the thickness of the hair. In thinned or fluffy
hair, these cells do not detect.
The sebaceous gland is an organ that secretes sebum,
which looks like a translucent fatty substance.
Located in the second layer of skin – the dermis, where it is attached close to
hair bulb. Interacting with a muscle that firmly holds
hair shaft provides its natural lubrication without
which is impossible the normal protection and functioning of the cuticle.
In this case, part of the fat falls on the epidermis – the topmost layer
skin, preventing its peeling and irritation.
Hair growth occurs cyclically. However, they can stay in
two stages – anagen (growth and development) and telogen (dormancy). AT
During the anagen period, 90% of hairs are usually present simultaneously. In it
time the papilla actively produces keratin, and the core
growing at a rate of about a centimeter per month.
The duration of the stage | – 2-7 years, after which the hair goes into
the rest phase, and the building material for the rod ceases
produced. Not receiving proper nutrition, it loses strength and
falls out. The duration of the telogen period is approximately three.
month, after which the papilla resumes work, and the rod
grows up again.
With the normal functioning of all components of hair
elements the process of transition from telogen to anagen occurs
continuously – while normally, no more than 80-100 hairs are lost in
a day that does not affect the density of the hair. However if
The amount of hair that has dropped out has increased – this is the first sign that
more and more follicles enter the telogen stage, a,
therefore, there was a serious malfunction in the body. More about
The structure of the hair will tell you the video of Ivan Baranov.
Thus, in this brief educational program, the most important
growth stages and principles of hair functioning. Next to be
find out which causes most often cause violations leading to
deterioration of hair and even baldness. In the next part
the course will be told why people suffer from hair loss
miss |
