Glands types: Endocrine & Exocrine - Biology Control & Co-ordination, Science Class 10 Video Lecture

hello friends this video on control and
coordination part 5 is brought to you by
exam fuel calm no move here from exam
now let us look at the types of glands
now when I was defining land I told one
thing that they produce and they secrete
some chemical substances there are two
ways they can secrete them one is they
can secrete them directly into the blood
and the other way is they can secrete
them on the apical surface of some
cellular component now based on this
that whether the secreted into the blood
or the secreted on the apical surface
glands are divided into two types the
first one which we are going to talk
about is the exocrine glands so what are
exocrine glands these glands secrete
their products directly into the apical
surface right so they do not secrete
their products into the blood they
secreted into the apical surface so
apical surface means the plasma membrane
the inner surface of the plasma membrane
of some cellular component so here the
glands directly reaches some of the
cells right so now how do they secrete
their products into the apical surface
some of the examples of exocrine glands
sweat glands oil glands salivary glands
these are some of the examples of
exocrine glands or how do the secrete
they have duct
now these exocrine glands are glands
with that water duct ducts are nothing
but tube-like structures so these ducts
actually connect them to body surfaces
so now what happens is the gland maybe
is located deep inside the body but
these glands have some tube like
structure which will actually connect it
to some superficial surface and that is
how it will secrete its product on to
the apical surface on the superficial
surfaces because it is connected to the
surfaces with the help of the tube light
Church now let us try to understand the
examples look at the example of sweat
glands so what happens in case of a
sweat glands so if you see here if you
look at this guy the sweat is being
observed on the skin so on a superficial
surface we can see the speck but can you
see the sweat glands no because the
sweat glands are located deep inside
they are not located on the surface of
our skin so even though they are located
deep inside but they deposit their
product on body surfaces right so their
products or their secretions can be seen
on superficial surfaces that is because
wherever the sweat glands are located
they are connected to the body surface
with the help of bats that is with the
help of tube-like structures so here you
can look at the structure of sweat
glands so here you can see some tube
like structure
so these tube-like structures are the
ducts so you can see ducts
so these tube-like structures which you
see they are the ducts and these things
which you see here they either glands so
these are your sweat glands and these
are the tubes so these tubes actually
connect the sweat glands to the surface
so whenever they secrete the sweat the
sweat goes to the body surfaces with the
help of these tubes right similarly let
us talk about the saliva regions you
know what is saliva I'm sure all of you
know by now it is the watery substance
which we generally see it is present in
our mouth cavity or the oral cavity so
inside your mouth you always feel some
watery substance which is present right
status saliva
now who secretes that saliva it is
secreted by the saliva joints no where
are the saliva glands located so here in
this picture you can see these three are
the three salivary glands the parotid
gland the submandibular gland
and sublingual gland these are the three
salivary gland so even these saliva
glands are located deep inside our skin
but the secretion that is the saliva is
seen in the oral cavity so it is on the
on a superficial surface so that is also
because they are connected to the oral
cavity surface with the help of ducts or
with the help of tube-like structures
and that is why their secretions are
seen on superficial surfaces now since
but now why are these glands called
exocrine glands EXO means outside the
generally the word EXO means outside
external means outside right so eggs
also means outside that means their
secretion is seen outside so it is on
the surfaces so that is why they are
called eggs or crying Giants and these
are the glands with ducts right so I am
sure now by now you would have guessed
that what is the second type of gland
which we are going to talk about the
second type of gland is the endocrine
glands so I don't think I need to
explain much in this because you would
have understood what is going to be
endocrine glands so these glands will
secrete their products directly into the
blood so they will not secrete it on the
surfaces now why they do not secrete it
on the surfaces because maybe they are
not connected to the surfaces so if I
say that they are not connected to the
surfaces that means they maybe they do
not have those tube-like structures so
they are missing the guts and that is
why they are called ductless glands
because they do not have the ducts so
these are the ductless glands connection
lost with the body surfaces because they
have low ducts so how do they exist they
exist as isolated blocks of tissues like
you you saw the picture for this one in
the previous slide I showed you the
picture for sweat glands right so how
how are they looking
they were like a gland which is
connected with a tube like structure so
that is how
exist but in case of endocrine glands
that tube-like structure or the duct is
missing so they exist as a bunch of
tissues so isolated blocks of tissues
that is how they exist and they produce
some chemicals and they secrete them
directly into the blood and then blood
carries it to different parts of the
body now that is why the name endocrine
endo means inside that means they
secrete they are secretions inside they
do not secrete
on the external body surfaces they
secrete inside the blood some of the
examples of endocrine glands are thyroid
gland pituitary gland hypothalamus and
pineal gland so these are some of the
examples of endocrine glands I am sure
that these names are quite new to you
maybe you would have heard about thyroid
but others would be new to you but in
this lesson we are going to study about
these endocrine glands because these are
the glands which produce hormones and
hormones are the substances which
actually govern the endocrine system so
endocrine system is composed of these
endocrine glands and these endocrine
glands produce some hormones and those
hormones actually perform many important
functions which help in the control and
coordination of our body so that is what
we will now talk about in detail so
these endocrine glands as I said there
are many endocrine glands which are
present in the body of human beings so
we will talk about all the endocrine
glands we will also talk about the
hormones which are secreted by each of
those endocrine glands and what purpose
they serve so here in this picture you
can look at the some of the examples of
endocrine glands the thyroid so where is
the thyroid gland present it is present
somewhere in the neck region right this
is a thyroid gland the hypothalamus
pineal gland and pituitary gland they
are all present in the human brain see
hypothalamus and pituitary are very near
to each other and pineal
is present almost in the center of the
brain right so these are some of the
examples of endocrine glands so all
these glands secrete hormones and they
secrete them directly into the blood so
let us have a quick comparison between
the endocrine and exocrine glands so
what are endocrine glands they secrete
chemical substances that is hormones
that travel through blood to specific
target organs of body okay and what
about eggs Oh cried they secrete
chemical substances that travel through
tubes to the target organs so they are
connected to their target organs which
is generally the apical surfaces through
tubes so the endocrine glands have all
ductless glands because they do not have
the tube-like structures on the other
hand exocrine glands are the glands with
guts examples of endocrine glands
include pineal gland thyroid gland on
the other hand slowly every glands sweat
glands are some of the examples of
exocrine glands so with this I think
your idea about glands the types of
glands water endocrine glands all these
things would have become clear
so now thank you please visit
www.payoor.com to watch more videos
attempt free online test
get free study material find tutors and
mentors thank you once again