Hello my name is charles chavez, today
we're going to talk about human
adaptations. To begin, the idea of human
adaptation sounds strange and unfamiliar
to the average Joe, but over time science
has shown that someone gaining an
ability to adapt to their environment
isn't fiction but reality.
By definition adaptations are traits
that have developed over time and gained
favor by natural selection, thus
allowing a population to handle the
conditions of their environment. Examples
of human adaptations would be larger
lungs and a large heart. Now you may be
wondering how would those adaptations
benefit me? Well glad you asked, let's say
you were in a higher altitude normally
you would struggle since we're so used
to ground levels and now the thing is if
you were to hypothetically have lived
there for generations you would start to
notice that the adaptations of having
larger lungs and a larger heart would
basically improve your experience in
those altitudes. Now that you have that
in mind we're going to talk about the
Himalayan population and how this
population has basically developed this
adaptation over time. To understand how
the Himalayan's had developed this
adaptation, we need to look at their
environment. The Himalayan's live at
altitudes of at least 8,000 feet from
what we can gather the Himalayans have
lived on the mountains for generations
which has allowed them to improve their
circulatory and respiratory system.
There are concepts like Alan's rule and
Bergman's rule that talk about
distinctive adaptations in the body due
to climate effects.
The first rule we're going to talk about is Alan's rule.
Alan's rule states that anything with an
equal dimension in all directions has
less surface area than an enlarged shape
An example of this would be a body with
lean features and long limbs bodies like
these are often found in areas like
Africa Hawaii or the Philippines due to
the hot temperatures there now we're
going to talk about Bergman's rule
Bergman's rule states that volume
increases more rapidly than surface area
meaning a large area is ideal so
individuals with large bodies are suited
to survive in cold climates. The shape of
the large body by itself is important
because the thing is in a cold climate
someone with a lean body won't be able
to trap as much heat as they can as
somebody with a larger body could so
people in cold climates like the Inuits
the elutes and the suni people and
various other people who live in other
cold climates have these large bodies to
withstand the cold climates
Now that you
have an idea of adaptations from this video, you should be able to point out
and make out whatever kind of
adaptations someone who could have or
could be developing over time thank you
for watching this video have a nice day
