Blood and its Components Video Lecture | Science & Technology for UPSC CSE

hello friends this video on tissues part
12 is brought to you by exam feel calm
no more fear from exam now let us look
at the different types of connective
tissue so far we saw what is connective
tissue what are what how does the
structure of a connective tissue looks
like so now we will talk about the
different types of connective tissue
which we are going to study in detail in
the next few slides for the first
connective tissue which we will talk
about this blood the next one would be
the support tissue now even inside
connective tissue we have broadly
classified them into few types so the
one who is black so that is considered
as a separate connective tissue then we
have support tissue there are certain
connective tissue whose main function
used to provide support so under that
category falls bone and cartilage then
we have Ben's connective tissue and
loose connective tissue dense connective
tissue as the name says it is very dense
that means maybe it is it has more
fibers in the extracellular matrix
the proportion of fibers is more and
when compared to the ground substance so
dense connective tissue are also
sometimes known as fibrous connective
tissue because there is more of fibers
so under this category falls the
ligament and the tendon so these
ligaments and tendons help in joining
bone to bone and bone to muscle so these
are dense connective tissues then we
have used the negative tissue under
which we will talk about a roller tissue
and adipose tissue so loose connective
tissue in a very similar fashion it will
have lot of lot of but at least it will
have some empty spaces that means in
hair like in dense connective tissue we
have more of I births in this case the
ground substance also plays a role in
case of loose connective tissue so these
are some of the types of connective
tissue which we are going to discuss in
this lesson so let us start our
discussion with blood so blood is a
fluid connective tissue so the question
here is why is blood a connective tissue
because you might be wondering that when
connective tissue is something which
joins things
for example bones tendons ligaments that
is quite convincing but why is blood a
connective tissue what is it connecting
we will see that now blood consists of
one who 78% of water and 22% of solids
so this is the composition now since
blood connects different systems of the
body by transporting gases digested food
hormones and waste materials to
different body parts that is why blood
is considered as a connective tissue
what is a connective tissue a tissue
that connects different body parts so if
you look at blood what does it do it
actually helps in transporting food or
waste materials from one part of the
body to another for example the place
where excretion has to happen it will
take the waste materials and throw it
there the two the different body parts
which needs food it will transfer it
there it will transport gases to
different parts of the body hormones and
other chemicals so it actually connects
different parts of the body and that is
why blood is gana considered as a
connective tissue right so if you look
at it just see how blood connects
different body parts so blood is flowing
everywhere well so it is actually
connecting all the different parts of
the body so now let us look at the
different blood components so what are
the different components which make up
blood now like every connective tissue
has a matrix similarly blood also has a
matrix because that was the general
structure of any connective tissue so
whichever connective tissue we will now
talk about we learned bone cartilage or
tendons everything will have a matrix
and they will also have some cells
embedded in that matrix so in case of
blood what does that extracellular
matrix the extracellular matrix in case
of blood is known as plasma or it is
also sometimes also known as blood
plasma so it is a fluid matrix on which
blood cells are embedded right so the
basic step
will remain the same you have one matrix
in that manhoods you have the cells
embedded let matrix is made up of fibers
and ground substance so that will remain
the same just that in some connective
tissue the matrix the nature of the
matrix will be little different in
somewhere else it will be subjective
level so in case of blood the
extracellular matrix is plasma which is
a fluid matrix now what are the cells
that are embedded in matrix the blood
cells there are many different types of
cells which are embedded in the plasma
so what are the different types of cells
the first one is RBC that is red blood
cells these are small cells without
nucleus so you can see in this picture
also they are showing those RBC's that
is the red blood cells which are small
cells without nucleus so this is a point
to remember that these cells and without
nucleus they carry oxygen from lungs to
different parts of the body so this is
the function of the red blood cells
because as I said by blood helps and
transportation now every component of
blood have a specific function for
example RBC will carry oxygen from lungs
to different parts similarly the next
component that is WBC which is also
quite as white blood cells what are they
these are nucleated cells that means
these are the cells with nucleus what do
they do they help fight infection and
builds that body's immune system so what
is immune system now for inside the body
of every individual we have a immune
system which by itself fight against
infections for example sometimes it
might happen that some infection is
entered your body by any means okay so
it will try to disturb your body but
there is by default an immune system of
the body which will try to fight that
infection
now if the immune system wins you do not
fall in at all but if the immune system
fails then you fall in because the
infection wins in that case and it
infects your body and you fall in
so these white blood cells make up the
immune system
they fight with the infection and thus
protect our bodies from getting infected
easy these white blood cells leave for
three to four days in human body so
their longevity is ready let's stay
alive only for three to four days after
which they die and then again new WBC's
are formed so the formation and the
completion of WBC's keep happening very
frequently and the third component is
platanus what a flatulence these are
smaller in size when compared to the red
blood cells and WBC's they help in blood
clotting after you ever seen that when
when you get a cut somewhere in your
finger or summin what happens it starts
really learn starts coming out but is it
that the blood keeps keeps on coming out
forever
it is not like that after some time the
blood clots right and that is where the
black olives play its role so the black
olives help in blood clotting
therefore it prevents excessive bleeding
from a person's body because if for a
small cut too much of blood comes out of
your body it becomes the body pick it
becomes to be because there is very less
blood left inside the body so platon
it's helped in blood clotting so these
are the three main components of blood
that is red blood cells w DC that is
white blood cells and the blood
plantlets right so now you understood
the structure of blood order how is the
structure of blood look like so blood
will have an extracellular matrix which
is called plasma in that glaze m'a are
embedded RBC's WBC's and platanus now
RBC WBC and platitudes they have their
own functions like RBC will carry oxygen
from lungs to different parts WBC will
fight with the infection and planets
will help in blood clot again
structurally also there are all
different RBC's are without nucleus
WBC's are with nucleus and that
it's are very small in size when
compared to the IVC S&W disease
now when I talk of WBC's here you can
see that the picture in the picture
there are so many different types of
issue with all different names so these
are the different components of WBC so
even inside WBC you have many different
types let me draw a your Sinovel ways of
the lymphocyte and monocyte but at
present we are not going into the detail
of all these different types of WBC's
because this is something which you
study in your higher classes so for now
whatever information is given is enough
another important question that might
strike your mind is why is this WBC
known as white blood cells because of a
red blood cells it is convincing because
the blood is red in color so maybe
that's why it is called red blood cells
but why white blood cells that is
because I'm taking a small blood sample
and doing a centrifugation of that
sample it was seen that a white layer of
nucleated cells was seen between the
RBC's and the blood plasma and because
of that white appearance of the
nucleated cells they are known as white
blood cells so under the microscope when
that blood sample was seen it was seeing
that there was lead to asthma there was
red blood cells they were all red in
color but there was a white layer of
nutrients and the nucleated cells cannot
be red blood cells so the nucleated
cells which were white in color were
termed as white blood cells so I think
we are good thank you
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