Structure of the human hair

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About the structure of the hair.

Facts about hair:

Diameter: 0.1 mm, growth per day: 0.3 mm, growth per month: 1 cm, hair density: 200 hair follicles per cm², life span: 2 to 5 years, carrying capacity: 100 g per hair.

Structure of the hair

The hair visible from the outside is only a small part of the total hair. The hair roots (also called hair follicles) reach deep into the skin.

The hair consists of hair follicles and the hair papilla. The hair papilla is located in the lower part of the dermis. It forms the hair and is thus, so to speak, the base of the hair. The hair shaft is formed by keratin-rich cells within the hair follicle upward toward the skin surface. The hair follicle is a rectangular recess in the epidermis through which the hair shaft passes.

People with brown or black hair have about 100,000 hair follicles, those with blond hair have slightly more (150,000) and those with red hair have slightly fewer (75,000). Hair color is mainly determined by the pigment melanin. Melanin is formed in the melanocytes and released to the hair roots.

The different hair colors are hereditary and result from different types, amounts and distributions of melanin. A decrease in melanin production causes hair to turn gray later in life.

Hair, what are they made of?

Burnt hair smells really disgusting. But why do they ... ▼

Burnt hair smells really disgusting. But why do they do that? How and what is hair made of? What do our fingernails or the horns of a rhinoceros have to do with it? How does a perm change the hair?

nine people like anna though chemistry in the
school but foolishly is also a
clumsy once briefly did not pay attention
and already he has the hair of his
teacher with the bunsen burner
torched while everything from the
house was just thinking why
it stinks in here so disgusting and exactly
this is what it's all about today
first of all, what is the structure of
a normal h when you're like this
then there are three areas of interest
on the one hand outside the scale layer the
has everyone so not so that the only
people have at the schneid when they
move her hair that are simply
several long old dead cells
which are on the outside of the have find but the
belonging also to shake and lazy
...not just hanging around...
underneath then comes the fiber sends
this is the next shift
it consists mainly of keratin a
long protein so a protein that
filaments can not form now to
confuse with creatine which is for the
energy supply of the muscles needed
is under the middle of very thick
have then still finds a cavity
the is called mark channel the
but the most important remains the keratin and
the stuff is really powerful because the
occurs everywhere
besides the hair, he is with us also in
the fingers and toenails contain
Overall, creative raw materials are also
called and the horn fabrics are there
now also enough in the animal kingdom
first of all with horns of animals thus
with rhinos and unicorns and stuff.
but also in call and claw or
a beak of animals is the
guarantees included
now one wonders what
the stuff because if it's in everything
and this is where it's important
protein it must be from the amino acids
and there above all the unclear
amino acids and to the system system is
an amino acid bearing an sh group
this is for the strength of the
respective material later very important
because two of them are on the same
strand or also from different
amino acid chains can combine to
this feed bridges the amino acid chains
now form certain structures
starting with an alpha elix so
a spiral staircase, so to speak, of the
amino acids can be thought of as
such an old phone cable from the
last century
that have already been
sulfide bridges stabilized thereof store
the two piece turns into a super
league together
also called proto filament which are
also through diesel feed bridges
stabilized two of them again to a
professional glasses together when the
store together you get micro and
later macro fibrills the then in h
are therefore from tiny stores
the stuff together until the size we
important now is how strong the horn
substance depends above all on
from share on shoots him down the more
of which the more diesel feed bridges in
horn of rhinoceros is found in the
comparison to human hair more
system and therefore that is also harder
the sulfide bridges are by the way
also important for perms around the
hair into a different shape and
so to keep the sulfide
bridge not gloatingly solved subsequently
you will be in the arbitrary form of
new hair, which makes the new
hairstyle is stabilized
besides the sulfide bridges play a role in
the hair the hydrogen bridges a
important role when you wet the hair
the newly forged ones will be
wet hair also behave differently
as dry now but again to the
burn the stuff and the smell
which is also related to the system
the more there is in it the more
sulphur one has logically also
inside if you burn the hair now
sulphur oxides are produced, such as
sulphur dioxide and precisely these substances
smell so disgusting
so if anyone wonders why hair
so stinky if she could burn him
tell you a lot about it now if you
more about the proteins like keratin
want to know then look at the video
here on there is explained how
assemble proteins yourself already times
hair or anything else torched then
write the stories in the comments
how it came to be, make it good till the
next time and ciao

The hair cycle

Every day new hair grows and every day hair falls out. This cycle repeats itself constantly and is completely natural. The hair cycle consists of three phases: (1) the growth phase (2) the transition phase (3) the rest phase. Each hair goes through its own independent cycle. Perennial growth phases alternate with shorter transitional and resting phases. Finally, after the resting phase, the hair is shed. The length and thickness of the hair is determined by the length of the growth phase.

Growth phase

During the growth phase, the hair grows by division of the hair cells. At any given time, about 80 % of the hair on the head is in this phase. It is the longest phase of the hair cycle, lasting between 2 and 5 years. The longer the growth phase, the longer the hair will naturally grow. Roughly speaking, the hair grows about 1 cm in a month.

The transition phase

The transition or resting phase lasts about 14 days and is therefore the shortest phase. Only a small proportion of all hair follicles are in this phase at any one time. In the transition phase, the hair follicle shrinks and the skin surface is closed. The hair has reached its maximum length and stops growing.

The resting phase

The resting phase follows directly after the transition phase. It is the last phase after which the old hair is expelled by a new one. This marks the beginning of a new cycle. The duration of a hair cycle varies according to age. The length of the cycle also determines the length and thickness of the hair.

As you can see, losing hair is quite normal. In a normal hair cycle, hair grows, rests and then falls out to make room for new hair. In a normal hair cycle, 80-100 hairs fall out per day. If this number is significantly higher, there may be a disruption in the cycle, i.e. an unusually strong Hair Loss.

Hair structure

welcome to the episode two by tobi yes if you ... ▼

welcome to episode two
by tobi yes if you think you are to the
fun today no worth have you received
tough luck
this will be a broadcast that we will call
identify infotainment
main topic will be that h why is it
as it is
she grows it what happens in there
this will build up to all the next
follow the world understand everything better
what we do there
from an evolutionary point of view, the hair
actually after protection organ the
designation organ is a bit
exaggerated but what has nature
because pressed on the eye as protection
we would have, for example, just the curly
hair and the dark we have the
smooth or slh but more on that later
there we have the bristles hair to it
belong the eyelashes the eyebrows noses
have bathroom and the pubic hair i
think they're pretty frosty that
know straight or in addition still the
body hair
we also call them plum hair these
are cosmetic we hairdressers do not say
fully usable that is your hair
dye a perm you also however
from who there is not possible and last but
not least our head hair which goes there
...and I'd like to introduce you...
take me into the world of the hsc
seen we have 50 percent carbon
23 percent oxygen 16% nitro 6
percent hydrogen and last but not
least 4 percent sulfur so applied
it is actually nothing at all therefore
we don't know how it works that
have stands from three layers from the outside
inwards means the scale layer
the phase shift and the middle runs
a market channel what we see on the graphic
scene is a schematic drawing
but from the ratio not right
because the named scale layer
the fatter one is she looks similar
like a dance tap only not in
individual plates as we have seen from
dance but recognize in wrestling and
each ring has in healthy condition
several individual plates the most important
task of the scale layer is
actually the protection against abrasion during
blow dry with the film brush heat shield
and that's why the markets
example that over time for the
hair longer the tips become thinner
these individual layers that
be explained
by the permanent use always
more worn always played like this
that's why we have to take care we come
but now to the most important actually
really the most important story
the hair of the father layer here
everything happens here goes the chemical
processes like hair color transformation of
stood here deciding who will be the
logging it becomes smooth
here we can do everything let's go
we have here the skin surface which
pure den haag anal and not too
confuse with the channel the mother
cell that produces the root into the
root again the hair at the beginning is
the hair galati many jelly wadding
pudding the more she grows upwards
it's conditioned by the air coming from
upstairs penetrate herter mocked her and
this is how you get your shape here
I drew you this with
a waveform that also means here
again galati and she becomes firmer and
gets its shape through this and so you can
you imagine that the big villas
or works or little the hair are so
and now I'm going to do the kandinsky for you.
in the phase layer and designated here
simply from the tip to the base are
stop different I mean
thousands of individual fibers that
like a telephone cable entangle
For the sake of clarity, I'll make
now here simply three of many
thousand per ha so that any formulas
it needs so-called rubber bands
or also bridges which are
Hold cross connection
the two most important are the double
sulfur bridges here with red
marked and always lie together
and again in green the salzkotten
the big difference here lies entirely
simply because the salt bridges
the green through what he of the
sidewalls can loosen and bind them
again when we dry the hair
after that, of course, was another
that is, we have led it
the height brush the round brush or the
holy wrap that's why we can
forms at the red her this double
sulfur bridges they are extremely stable
have nothing to do with the water that
does that mean it always stays loose or something
smooth as her has it from nature for it
that this of the liquid the rails
the hydrochloric acid I just times purely that
with more intelligent sound these
free the side walls from the backs or
the other way round, of course, the bridges from
side walls and afterwards after this
intervention time recognizes that will
then comes the so-called
fixation on it and as oxygen
inside which in turn binds again this
double strokes like rubber bands on the
sides and that is the principle of a
perm and it was already lay
that's why we can't help but notice
to illustrate why sometimes your
hair not hold so well i have you
times two isolation so prepared the
should show the cross section of the hair
will be the round one here and the
oval we call that in the technical language
have the tape yes why do I tell you
that there are many and that concerns
just the hairy so the hair
is very thin in diameter
I say that always hangs down that holds
I'm feeling, and it's just slipping out into...
most of the time you'll have one of those
tape have what happens I show you
first the positive side of the round
if you have the round and now make
I that time can you no matter what lets
getting the hair formula where you want it
does everything with it because it is round different
does this then behave with the oval
here i can go over the narrow side
very great tears i try that but
about the strong side about the
lengthwise unfortunately this does not happen
as well anymore, and that's why
the hair does not hold since she does not
be evenly spaced
it means that in different
positions also a bad
durability arises so and now come
we go to our before and after story
take a look
a thank you to marion sack felder from
she belongs to the german national team
of the cts and the obermeisterin though
you this is a call if you too
dear colleagues follow pictures or videos
from before and after she sends us
so people that's it for today you have
questions suggestions or go write us
please the harry potter team says
until next time

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