Photosynthesis (Part - 2) - Botany, Class 11 Video Lecture

hello kids do you know how plants make
their own food no well this video
elaborates the process of photosynthesis
by which plants make their own food
photosynthesis is the process used by
plants to make their own food or in more
complex terms it is the conversion of
light energy into chemical energy by
plants this chemical energy is used by
the plants for growth and nourishment
photo means light and synthesis means
putting together in greek when humans
cook food some essential things are
required including fire water vegetables
etc similarly to make their food plants
also need some essential factors
including light water nutrients soild
etc plants get light from the Sun water
from the ground and carbon dioxide from
the air all of these factors including
air water carbon dioxide and sunlight
together help plants turn out their own
food plants have tubes called xylem
located in the stems through which the
water from the ground is sucked into the
leaves this system works similar to
humans sucking liquids through a straw
the xylem is spread throughout the
different parts of the plant including
the stem branches and all the way up to
the leaves the xylem transports vital
nutrients to the entire plant xylem Xin
the plant are like blood vessels in the
human body that act as an important
means of transportation of water and
nutrients leaves on the plant have pores
very similar to the pores on the skin of
our bodies these pores are called
stomata the stomata are responsible for
the exchange of gases the carbon dioxide
present in the air which is responsible
for photosynthesis enters the plant
through these stomata
oxygen also comes out through the
stomata leaves have important cells
called mesophyll cells these cells
contain a green color component called
chloroplasts this chloroplast is
responsible for the green color of
plants and leaves once the carbon
dioxide and the water reach the
chloroplasts in the residence of
sunlight the process of photosynthesis
starts to take place the following
reaction takes place in the leaves of
the plant during photosynthesis carbon
dioxide plus water in the presence of
light energy results in oxygen plus
glucose or carbohydrates the products
formed are glucose and oxygen
carbohydrates which are a form of
glucose are synthesized from carbon
dioxide and water glucose is used by the
plants for their growth some of the
glucose is used immediately and the
extra glucose which is not used is
stored in the form of starch in the
leaves some amount of this extra glucose
is also stored in the roots of the
plants this extra glucose is used to
perform photosynthesis when there is no
sunlight oxygen is given out into the
air through the stomata in the process
of photosynthesis the oxygen that is
released is used by human beings to
breathe during their respiration process
ever wondered why this process is called
photosynthesis well the word
photosynthesis is a combination of two
Greek words photo and synthesis photo
means light in Greek and synthesis means
putting together or combining hence
photosynthesis literally means combining
water or carbon dioxide in the presence
of light so the essential factors for
photosynthesis to take place include
sunlight water and carbon dioxide under
water photosynthesis takes place at a
slower pace than the normal
photosynthesis this is because energy
from the Sun is absorbed by the water
layers and only some amount of energy
actually reaches the plant there are
some plants which don't need the process
of photosynthesis to grow such plants
and include mushroom venus flytraps etc
mushrooms get their food from the ground
and from their surrounding areas venus
flytraps
trap and catch small insects which come
near the leaves and eat them don't
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