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Overview of the Endocrine System
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CEFR लेवल
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सबटाइटल्स (450 खंड)
hi everyone dr mike here in this video
we're going to take a look at the
endocrine system
[Music]
now the endocrine system is a collection
of cells and glands that produce and
release
hormones these hormones are just
chemicals that jump into the bloodstream
and have their effect in distant areas
of the body
now it's a communication network similar
to the nervous system that controls
physiological activity but it's a little
bit different it's different in the
sense that the nervous system
is very fast it's very direct and
usually it's short acting
the endocrine system is the opposite so
it's quite slow to have its effect
it isn't direct because it jumps into
the bloodstream and travels to very
distant areas of the body
and it can last a long time some
hormones when they're released
can have their effects that last hours
to days to sometimes
weeks so in this video we're going to go
through some of the important
cells or glands that produce and release
hormones and go through
what these hormones are and have a quick
look at their activity or function in
the body
we're going to do this a top to toe
mechanism start at the top and move our
way down so to begin we need to start at
the brain
specifically at the base of the brain
there's something called the
hypothalamus which is telling you
it sits below the thalamus this is the
hypothalamus it sits here
we've taken it across here here's the
hypothalamus and you can see that
there's
an extension of the hypothalamus that
has two lobes to it or two parts
this is called the pituitary gland and
that's another endocrine
tissue or gland that itself produces and
releases hormones
the hypothalamus produces another a
number of hormones
that has its effect to control and
regulate
the endocrine system of many other
tissues of the body so we call the
hypothalamus
the master regulator or the control
center of the endocrine system
now five important hormones that the
hypothalamus produces
and releases to control many other
aspects of the endocrine system
these hormones are thyrotropin releasing
hormone
corticotropin releasing hormone growth
hormone releasing hormone
prolactin releasing hormone and
gonadotropin releasing hormone so a
couple of points here
releasing hormone tells you it goes
somewhere else
to release a hormone all right makes
sense also
tropon as a suffix tropin sitting at the
end of the word
if you see a hormone with tropon as a
suffix it means it's going to go to
another tissue of the body to tell it to
release another hormone all right
so how does this work well the
hypothalamus
talks to both aspects of the pituitary
gland
posterior and anterior but interestingly
the anterior is connected to the
hypothalamus through a blood supply
which means the only way the
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