as you can see we've had another week away but I'm still gonna give you a good
episode the science with Steph this week, and be sure to stay tuned to the end
because I think I've worked out something pretty spectacular!
have you ever been watching a movie when
just how much hair does Rapunzel have how heavy is it?
would all that weight pull her hair out of her head? and anyway what even is hair
and why does grow really long on my head and really short on my arms
welcome to Scienc with Steph the show where I think way too much about the world
around us, and then share the best bits with you guys
this week I'm looking at human hair what is it why does it grow and in the movie
Tangled how heavy is all that hair? well first let's look at the human body we
grow hair almost all of our entire bodies and the type of hair and where is
on your body can determine how long it is to have fast it grows. Avery hair any
one time can be going through one of three phases of growth: that's the anagen
phase the castagenn phase and a telogen phase the first phase is the anagen
phase where there's rapid cell division at the base of the follicles producing
lots of keritinocytes. This bulb grows and grows and gets squeezed out the
follicle where the cells die and produce keratin which is a strong prottein, and this
strong strand of keratin pokes out of your skin and continues to grow
throughout the whole anagen phase. This growth phase can last various different
lengths of time depending where it is on your face or body. The anagen phase for
your hair in your head typically lasts three to six years alowing
for a maximum growth length of around one or two meters. Though in Rapunzel's case
she clearly has some super producing anagen that just never stops! for normal
non magical princesses usually about 70 to 80 percent of any of your hair at any
one time can be going through the anagen phase the second phase is the catagen
phase where the blood stops flowing to the follicle and cuts off the bulb from
the rest of the hair that follicle shrinks and eventually pushes that
existing hair up to the surface of the skin and the third phase which is the
telogen or resting phase typically lasts one to four months the follicle at this
point is dormant and at the end of the day the follicle expands and the hair is
released called shedding and after the follicle widens again we're back to the
anagen phase so now that we know all this I'm gonna ask the important
questions how long is Rapunzel's hair and how
heavy is it?
so from all the information I've gathered Rapunzel's hair seems to change
length quite a lot in the film The Longest it appears to be about 21 or 22
meters using a hair of mass of about 300 grams per meters gives a total weight of
about 7 kilograms that's about the way of having two laptops hanging from your
head the world record for weight ever left of my hair is 81.5 kilograms
that's 179 pounds for you Imperials over this was done by a Russian man named
Abdul Rahman Abdul Aziz off Abdullah's it off Abdul Aziz off I can't I can't
pronounce that that's heavier than me and I'm pretty heavy so Rapunzel's hair
while it's heavy is well within the region of cariable, and I think I've
worked out where her powers lie clearly her cells just rapidly dividing
meaning that her hair grows much faster than the average person it means that
her magic keeps people looking young because their cells are rapidly dividing
and it can heal people using the power - there you go
Sciences magic hope you enjoyed this episode of scientist s I bring a new
videos every Friday so if many people asked to do you can click here or if you
consider subscribing click here till next time bye
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