Important diagram for class 10 science
1.
Open and close stomata pore –
The opening and closing of stomata is controlled by the guard cells. When
water flows into the guards cells, they swell up and the curved surface causes
the stomata to open. When the guard cell loses water ,they shrink and become
flacid and straight thus closing the stomata.
1. flower –
flowers are the reproductive part
of a plant . they are not only involved
in reproduction but are also a source of food for other living organism . they
are a rich source of nectar.
The different part of a flower is labelled below .
2. human heart-
heart is muscular organ, big as
our first, reddish brown colour , situated between the 2 lungs in middle of
thoracic cavity , surrounded by 2 layered sac.
It has different chambers to prevent the oxygen rich
blood from mixing with blood containing carbon dioxide.
3. Digestive
system –
The digestive
system is made up of the different parts of the alimentary canal .
this canal is a long , twisting pipe like structure ( about 9 meters in total )
that starts at the mouth and ends at the anus . along the way the food is break
down from chunks into molecules enough to pass through cell membranes and
supply energy to cells.
4. Kidney –
The
excretory system consist of a pair of kidneys, a pair of ureters, a urinary
bladder, and a urethra.
. Nitrogenous wastes such as urea and uric acid are
removed
. Nephron – basic filtration unit
. Main components of the nephron – glomerulus,
bowman’s capsule, renal tube
5. Human brain
-
The human brain is the command centre for the entire nervous system . it
works like a computer to process various information that it receives as
signals from the other sensory organs in the body and sends messages back to
the body.
6. Structure
of Neuron –
Neuron comprises of
dendrite , axon and cell body . dendrites receives messages from the
surrounding and sends it to the cell body . cell body consist of nucleus ,
mitochondria and other organelles. Axon transmits the message away from the
cell body and pass it to the next receiving neuron .
7. Regeneration
in Planaria –
Planaria have
the ability t give rise to new individuals from their body parts. This process
is called regeneration . if the body of planaria is somehow cut or broken up
into many pieces , each piece grows into a complete organism. Regeneration can
take place from any part of the planaria.
8.
Budding in hydra –
Organism such as hydra use regenerative cells for reproduction in the
process of budding . in hydra , a bud develops as an outgrowth due to repeated
cell division at one specific site .
these buds develop into tiny individuals and , when fully mature , detach from
the parent body and become new independent individuals.
9. Male reproductive system -
The male
reproductive system includes testes, scrotum, spermatic ducts, sex glands and
penis . all these organs work together to produce sperm , male gamete, and
other components of semen.
10.
Female reproductive system-
The
female reproductive system is framed to perform different functions . it creates egg cell that are essential for
reproduction known as ova the system is organized to the ova the region of
fertilization . the egg fertilization takes place in the fallopian tubes along
with the sperm.
11.
Human eye –
A natural optical instruments which is used to see the objects by human
beings . it is like a camera which has a lens and screen system.
12.
Structure of motar –
The direction of
magnetic field is form N pole of the magnet to its S pole
Applying fleming’s left hand rule to sides AB and CD
of the coil, the force on side AB of the coil is in downward direction whereas the
force on side CD of the coil is in upward direction.
13.
Structure of generator-
The electrical generator works on the
principal that
When a straight conductor is moved in a magnetic field,
Then current is induced in the conductor.
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