class 7 respiration in organisms

1. Respiration in organisms
Class 7 science
- presented by dhruthy hiremath

2. RESPIRATION IN ORGANISMS
Respiration takes place in the bodies of both animals
and plants
Breathing is the process of air moving in and out of
the body
Breathing is the part of respiration

3. RESPIRATION- Is a process in which energy is
released from the food
OXIDATION- Is the reaction of food with oxygen

4. GLUCOSE-The substance that is oxidised during
respiration

5. BREATHING
Taking in air rich in oxygen into the body is called
inhalation
Giving out air rich in carbon-dioxide from the body is
called exhalation
One inhalation and one exhalation constitute one breathe

6. The number of times a person breathes is termed as
the breathe rate

7. RESPIRATION TAKES PLACE IN THREE
PHRASES
1.Internal respiration - Exchange of gases from the
body and environment
2.External respiration - carrying oxygen into cells
and carbon-dioxide through blood
3.Cellular respiration-breaking down of food in the
cell to release energy

8. CELLULAR RESPIRATION
Cellular respiration
Anaerobic respirationAerobic respiration

9. AEROBIC RESPIRATION
The process by which organism respire in the presence of
oxygen
Releases 36ATP
Occurs in plant cell and animal cell
Glucose+oxygen carbon-di-0xide+water+glucose

10. Anaerobic respiration
The process by which organism respire in the absence
of oxygen
Releases 2ATP
Anaerobic respiration occurs in some organism like
yeast and some bacteria
Glucose Ethanol + Carbon-dioxide + Energy

11. DIFFERENCE BETWEEN AEROBIC AND
ANAEROBIC RESPIRATION
Aerobic respiration
1.Oxygen is necessary 5. Carbon-dioxide & water
2.Occurs in cell [mitochondria]
3.Large amount of atp
4. Total breakdown of glucose

12. Anaerobic respiration
Oxygen not necessary
Occurs in cytoplasm
Small amount of atp
Partial breakdown of glucose

13. ORGANS INVOLVED IN RESPIRATION
● Nostril
● Nasal cavity
● Trachea
● Bronchi
● Lunges
● Bronchioles
● Alveoli
● Diaphragm

16. ● The air first enters the nose. Here, dust particles
and germs are trapped by the nostrils
● The clean air is than passed through trachea and
than into bronchi
● Than the air is passed through small tubes called
bronchioles
● Each bronchioles contain alveoli which consists of
blood capillaries

17. ● Here the oxygen is highly concentrated in alveoli
and lowly in blood capillaries
● So the movement of diffusion takes place , where
the oxygen moves from highly concentrated
area(Alveoli) to lowly concentrated area(blood
capillaries).
● The oxygen is distributed to all all parts of thee
body by blood vessels.

19. Diffusion in amoeba occurs in cell membrane

20. RESPIRATION IN INSECTS AND
ANIMALS
(All insects contain spiracles)

21. RESPIRATION IN COCKROACH
● Cockroach contain network of branched air tubes
called trachea
● This air tubes have opening called spiracles on body
surface
● The oxygen rich air enters trachea through spiracles
● This diffuses[leave] in tissue and reaches every cell of
the body
● The carbon dioxide is released out from the body by
spiracles

22. RESPIRATION IN EARTHWORM
● Earthworm breathes through skin surface
● This lives in moist area
● This is red in colour because of large number of blood
capillaries present in them
● The skin is known as epidermis as it made of
epidermal cells
● Contains spiracles
● Earthworm and leeches absorb oxygen from the air in
their blood through moist skin

23. RESPIRATION IN FISH
● Contains special organ present in operculum - gills
● The oxygen dissolved in water is first taken through
mouth
● Then this is dissolved in gills[red] which contain blood
capillaries.
● Blood capillaries contain blood vessels
● Remaining come out from operculum
● Fish does not have alveoli to store oxygen
● In order to kill microorganism fish can be kept in
refrigirator

24. ● Fish contains lamella which take oxygen and carry to
blood vessels
● Blood is present in blood vessels which distribute
oxygen to all parts of the body

25. RESPIRATION
IN
PLANTS

26. ● Plants respire through diffusion
● Leaf and in young stem contain stomata
● Stomata is present in between the epidermal cells
● Respiration in plants is done with the help of stomata
in leaves, lenticels in bark and with the help of root
surface
● Lenticels helps in exchange of gases (as it takes in
oxygen and gives out carbon-dioxide)
● Day-Stomata
Night-Lenticels

27. ● Roots absorb oxygen from air present in between the
soil particles through root hair
● Root surface take oxygen and give carbon dioxide
● The plant sometimes gets wilt because of lakh of
water. This is because oxygen can be taken in as there
is no space between soil particles

28. DIFFERENCE BETWEEN
PHOTOSYNTHESIS AND RESPIRATION
PHOTOSYNTHESIS
1. Food is made
2. Energy from sunlight is stored in
glucose
3. Carbon dioxide is taken
4. Oxygen is given out
5. In plants only(chlorophyll)
6. Sunlight is needed
7. Occurs in chloroplast
RESPIRATION
1. Food is broke down
2. Energy stored in glucose is
released
3. Carbon dioxide is released
4. Oxygen is taken
5. In all living organism
6. Sunlight is needed
7. Occurs in mitochondria

29. Thank you