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RESPIRATION

WHAT IS RESPIRATION ?

RESPIRATIONThe reaction takes place between oxygen and a substance which contains carbon.

The reaction produces carbon dioxide and water, and releases energy.

One of the energy-producing reactions is called respiration.

The chemical reactions of respiration take place in all living cells.

The formula for aerobic cellular respiration is C6H12O6 + 6O2 → 6CO2 + 6H2O + Energy (as ATP)

The word equation for this is:Glucose (sugar) + Oxygen → Carbon dioxide + Water + Energy (as ATP) (ATP-Adenosine tri phosphate )

Cellular respiration is what cells do to break up sugars into a food that the cell can use as

energy.

This happens in all forms of life.

Cellular respiration takes in food and uses it to create ATP, a chemical which the cell uses for energy.

Some simple organisms can only go through anaerobic cellular respiration.

TYPES OF RESPIRATION

There are two types of respiration-

1.Aerobic respiration

2.Anaerobic respiration

WITH THE USE OF OXYGENGLUCOSE CARBON DIOXIDE + WATER + ENERGY

AEROBIC RESPIRATION

2.During the process of aerobic

respiration, the molecules of food are broken down to obtain energy.

3.In other words, when there is

respiration through the aerobic process, Glucose together with Oxygen produces Energy, Carbon Dioxide and

Water.

1.In aerobic respiration,

oxygen is required.

ANAEROBIC RESPIARTION

GLUCOSE

WITHOUT THE USE OF OXYGEN

ALCOHOL + CARBON DIOXIDE + ENERGY

1.In plain language, anaerobic means

where there is no air and thus anaerobic respiration is a term

used for the respiration that occurs without the

use of oxygen.

2.This occurs in some yeasts and bacteria and

in the muscle tissue when oxygen is not

present.

3.The obligate anaerobes are the organisms which cannot use the

atmospheric oxygen for respiration. .

4.Alcoholic fermentation is a type

of anaerobic respiration in which

one of the products of the reaction is ethanol.

Air forced out

Ribs move back

Diaphragmmoves back

Giving out of air rich in carbon dioxide is known as exhalation.

BREATHING INHALATION EXHALATION

(Breathing means taking in air rich in oxygen and giving out air rich in carbon

dioxide.)

Ribs move out

Diaphragm moves down

Taking in of air rich in oxygen into the body is called inhalation.

Air is drawn in

THE JOURNEY OF AIR TO THE LUNGS

nostrils into the nasal cavity.

into pharynx then via trachea into lungs.

Lungs are present in the chest cavity. This cavity is surrounded by ribs on the sides.

A large muscular sheet called

diaphragm forms the floor of the

chest cavity.

BREATHING IN OTHER ANIMALSEarthworm breathe through their skins. The skin of an earthworm feels moist and slimy on touching. Gases can easily pass through them.

A cockroach has small openings on the sides of it’s body. These openings are called spiracles. Insects have a network air tubes called tracheae for gas exchange. Oxygen rich air rushes through spiracles into the tracheal tubes, diffuses into the body tissues, and reaches into the cell of the body. Similarly, carbon dioxide from the cells and goes into the tracheal tubes and moves out through spiracles. These air tubes or trachea –e are found only in insects and not in any other group of animals.

Tracheae

Breathing under water

Breathing organs in fish

Gills

1.Fish breath through gills.

2.Gills are projections of the skin.

3.Gills are well supplied by blood vessels for exchange of gases.

1.Plants respire through their leaves.

2.Leaves has tiny pores called stomata . Through which they exchange gases.

3.The leaves take in oxygen from air & give out carbon dioxide.

4.In the cells oxygen is used to breakdown glucose into carbon dioxide and water. Roots take up air from air spaces between the soil.

Soil particles

Root hair

Air space

BREATHING IN PLANTS

Breathing under water

Breathing organs in fish

Gills

1.Fish breath through gills.

2.Gills are projections of the skin.

3.Gills are well supplied by blood vessels for exchange of gases.

THANK YOU

AKSHARA RAGHUNATHANCLASS VII-A , KV BHANDUP