Xylem & Phloem : Tissues - Science, Class 9 Video Lecture

hello friends today we will discuss
about transportation in plants and also
briefed about xylem flowing conducting
tissues suppose let's say this is a
structure of a plant okay this is a
plant structure it is a stem part and
this is the root part the many roots and
leaves coming out
something like that and the ethics part
although now from the root part all the
water transport and takes place it's a
part where all the water absorption
takes place and it moves wire this
vascular bundles the output portion
where the requirement of water is there
and from here the transpiration
straitlaced from the leaf surface and
the water current of the plant is
fulfilled the same way we can say the
root system of doing the sunlight in
presence of carbon dioxide
photosynthesis the photosynthesis takes
place and all the food material it is
produced is transferred downwards to the
portion which is it requires that
particular food material of work now
this complete transport system is done
by two pathway that we call as xylem and
phloem
xylem and phloem tissues and now the
next thing is we will explain more about
what is this xylem and phloem tissues
and how they help in moondoor various
water minerals obtained from soil it is
moved up by xylem and flowing with
transports all the products of potencies
from the leaves from their synthesized
and they are transferred to other plant
other part of the plant supposing this
is the cross section of a stem this from
the width part the middle part now we
have the outer critical part then the
phloem and xylem tissues like this we
have
the inner part adds eylem and the outer
path add flowing so this from the outer
part this from the inner part and the
middle part in perfect it's both is
called flow cambium Pro cambium now the
same structure had been depicted here so
this is a flowing part the pro cambium
part and the xylem part these are the
various tissues unless the outer cuticle
of the plant so this constitutes a
complete wrestler system of a plant
which helps in the wound of material of
translocation metal up and down in a
plant system and and it helps in doing
all the metabolism in the plant now we
know you see the long term section of
the xylem and phloem part this form the
auto critical of the plant and this part
forms are flowing part so the longer you
can see it comes out to part of that
part of the system and the inner part we
transfer is all the food material or the
water material from the water from enter
on windows from roots to the other parts
Asylum so this forms our internal part
and this one external part and this part
is divided by this cambium cells can
move tissues so this structure
completely forms a long-term structure
and laterally if you see you have seen
that this is a lateral section
so what section have seen now getting to
a detail part of the xylem so xylem
tissue consists of two types of cells
when it's vessel cells and other this
jacket cells
so these vessels are you can say is a
cylindrical cells like this it is
arranged longitudinally with open ends
open end this is the vessel cells which
help screen won't off all the water from
root to the upper part then from the
track each cells
this is bracket bracket tissue in the
xylem which are elongated and spindle
shaped and it have more or def cells we
can see this looks like this so
elongated and if it's a dead cell you
can combination of with with the vessels
lessons are more active and and along
itself this from the bracket part which
is a dead part through these two
elements formed eylem system there's a
low vessels and trakis are both non
living and conducting tissues they are
both non living and both are conducting
so these are you shall creatures of this
both the tissues which forms a xylem
part now coming to the other part that
is deployed now the phloem consists of
if you see the launching section of a
blowing part it consists of two three
structures and if you could see these
are the poorest part it's a porous part
now if I indicate that part these are
the poorest see see pores this has pores
and we have see cells this acts like a
filter in type of thing and the tube
consists of the pores and the sieve
sieve sieve sets
these forms are companion cells is from
the campaign in cells and this is the
outer cuticle you teatro critical part
and the inner portion is the phloem part
with a longer tube cells and in this
healthy moment of all the it conducts
food materials in the vascular band and
it transports all the photosynthesis and
need for storage and comes with a
purpose to other part of the plant now
if you see the structure of this flowing
and you can see the movement goes
through the moment takes place through
or sieve tube this is the same tube C Q
so the complete structure we can define
like it has a sieve tube it has a
companion cell it has C pores and C few
cells so this also on the proper
structure of a flowing part this phloem
and the xylem together health pain
movement of all the food material from
as I told you earlier from lower part
the root part the upper part of the
plant another part another area that it
mingles and waters are moved by xylem
and the phloem moves all the producing
states and other material which is
produced by the process of Ordinances to
a different part of the plant so the
food is basically a sugar and a tomato
Pollitz
is right with us inside the leaves and
substances like hormones which active
since eyes are the tip of the root of
stem MA transport another part and this
all done through this flowing part is
also conducting tissue
this is the way how transportation of
all materials takes place in a plant and
we think 10 bucks right in the next I
think we have come almost cover to major
part of the plant leaf structure and its
constituent of lyric and how the moment
takes place in the plant now next
session we will look at the various
aspects of transpiration other taneous
importance of transpiration which takes
place in a plant thank you