Transportation in Plants - Transportation in Animals and Plants - CBSE Class 7 Science Video Lecture

transportation implants in the previous
act
about transportation in human beings now
let us learn transportation in plants as
we have discussed earlier plants prepare
their own food using simple compound
inorganic sources such as co2 water
along with some raw materials and
photosynthesize energy in the presence
of sunlight and stowed in the
chlorophyll of leaves the plants require
raw materials like soil nitrogen
phosphorus and other minerals to build
their bodies the plants absorb raw
materials from soil with the help of
roots which are in contact with the soil
if distance between soil root and
chlorophyll is more energy needed is
less and raw materials can easily
diffuse into all parts of plant body if
distance between soil root and
chlorophyll is large it needs much
energy and raw materials cannot diffuse
easily in such cases a proper system of
transportation is essential example tall
trees the energy requirement for
transportation also varies according to
plant structure as plants do not move
and plant bodies have large dead cells
in many tissue as a result plants have
low energy needs and use slow transport
system in case of tall plants distance
server transport system is large why do
plants need a transport system plants
need water
mineral salts and raw materials for
photosynthesis in order to survive the
water and mineral salts from soil is
transported into plants through roots
this can only be transported through the
water carrying chips in the stem also
known as xylem products of
photosynthesis prepared in the leaves
are to be transported to the other parts
of plants this can only be transported
by the food carrying tubes also known as
flowing transport of water in xylem
tissue vessels and tracheids
are the two types of transport tissue in
plants both vessels and tracheids
consist of thick cell walls tract aids
are single cell shorter in length
whereas vessels are several cell and
much longer than tickets in xylem
vessels and tracheids of roots stem and
leaves are interconnected to facilitate
continuous water conduction system to
all parts of plant the water transport
upwards against force of gravity with
the help of xylem vessels in the
movement of water upwards plants have
two types of strategies absorption of
water as a xylem vessels cells of root
are in contact with soil it actively
absorbs the water ions when root is
contact with the soil soil has more
concentration of water and root has less
concentration obviously a difference in
concentration of ions is present in
between the root and soil to balance
in water ions between Drude and soil
water moves into root which means as
steadily or continuous movement of water
into xylem of roots which creates column
of water steadily pushing upwards in
xylem the flow of water is bulk flow and
negative pressure facilitates movement
of water and minerals into roots
transpiration of water transpiration is
nothing but of evaporation of water
molecules from stomata of leaves into
atmosphere stomata are at guard cells in
definition transpiration is defined as a
loss of water in the form of vapor from
the aerial parts of the plant is known
as transpiration the loss of water
molecules or evaporation of water
molecules through leaves creates suction
or root pressure pulls water upwards
through xylem cells of root thus the
losses of water through stomata of
leaves are replaced by suction of water
through xylem vessels in the leaf it
also helps in temperature regulation
during the day
transpiration helps in conduction of
water through silent vessels and
maintains balance of ions between root
and soil during nights root pressure
occurs due to difference in
concentration of active lines between
root and soil help in conduction of
water flow in phloem is another
conducting tissue in the transport of
fluids the structure of flown consists
of conducting cells called sieve
elements which are thick circular and
elongated cells the food that is
synthesized in photosynthesis
as soluble products like sucrose and
nutrients carbohydrates etc are
transported through phloem in upward and
downward directions to all parts of
plant the transport of soluble products
of photosynthesis is called
translocation it can be done by using
the energy in the form ATP adenosine
triphosphate produced by photosynthesis
phloem also transports amino acids and
other substances these are especially
transported to fruits and scenes for
storage and food transported to roots
for the requirement of energy in the
process of absorption of water from soil
to roots sucrose is transferred into
flavin by using energy from ATP
molecules leads to increase the osmotic
pressure of the tissues and water moves
into phloem and materials in the phloem
2 tissues which have less pressure for
example in the spring sugar stowed in
drew the stem tissue would be
transported to the buds which need
energy to grow