One of the characteristics of living organisms.

Clue:

O NE S P I R A T IR

Objective 1Objective 1

To explain what respiration isTo explain what respiration is

What is respiration?What is respiration?

1.1. The release of The release of energyenergy 2.2. when when food substancesfood substances are broken down by are broken down by 3.3. oxidationoxidation into into simplersimpler substances substances 4.4. such as such as carbon dioxidecarbon dioxide and and water.water.5.5. It is a chemical process.It is a chemical process.

DO YOU THINK PLANT RESPIRE?DO YOU THINK PLANT RESPIRE?

Objective 2Objective 2

To state the two types of respirationsTo state the two types of respirations To define what is aerobic respirationTo define what is aerobic respiration

RespirationRespiration

AerobicAerobic Anaerobic Anaerobic

There are two types of respiration:

Aerobic respirationAerobic respiration

1.1. The release of a relatively The release of a relatively largelarge amount of amount of energyenergy

2.2. by the breakdown of food substancesby the breakdown of food substances

3.3. in the in the presencepresence of oxygen of oxygen

Definition:

Objective 3Objective 3

To state where aerobic respiration takes placeTo state where aerobic respiration takes place To construct the word equation for aerobic To construct the word equation for aerobic

respirationrespiration

Aerobic Respiration occurs at the cell Aerobic Respiration occurs at the cell in the ….in the ….

MitochondriaMitochondria

Glucose

O2

Enzyme

Co2EnergyWater

Enzyme

AeroAerobic Respirationbic Respiration

Breakdown of food substancesBreakdown of food substances Occurs in the mitochondriaOccurs in the mitochondria Similar to combustion of fuelSimilar to combustion of fuel Can be written in a word equation:Can be written in a word equation:

Glucose Oxygen +Carbon dioxide+

Relatively lots of energy

Water +

Objective 6Objective 6

To understand what is inspiration and To understand what is inspiration and expirationexpiration

To compare the composition of air in inspired To compare the composition of air in inspired and expired airand expired air

Inspiration Inspiration

Air breathed in

InspirationInspiration

Occurs when air is taken into the lungsOccurs when air is taken into the lungs

ExpirationExpiration

Air breathed out

ExpirationExpiration

Occurs when air passes out of the lungsOccurs when air passes out of the lungs

Make a Guess…Make a Guess…

From your knowledge state the From your knowledge state the differences between inspired and differences between inspired and

expired air.expired air.

Experiment 1Experiment 1

Inspired Air

Inspired Air

Expired Air

Expired Air

1st hour2nd hour

Let’s Try…Let’s Try…

Lime water experimentLime water experiment

Experiment 2Experiment 2

AirVacuum

PumpLime WaterExpired Air

Experiment 3Experiment 3

Expired air

MirrorWater droplets

Components of inspired and expired Components of inspired and expired airair

Components (%)Components (%) Inspired air (%)Inspired air (%) Expired air (%)Expired air (%)

OxygenOxygen About 21About 21 About 16About 16

Carbon dioxideCarbon dioxide About 0.03About 0.03 About 4About 4

NitrogenNitrogen About 79About 79 About 79About 79

Water VapourWater Vapour variablevariable saturatedsaturated

TemperatureTemperature Atmospheric Atmospheric temperaturetemperature

37 degree celsius37 degree celsius

Review TimeReview Time

Why are the amounts of oxygen, carbon Why are the amounts of oxygen, carbon dioxide and water vapour different in dioxide and water vapour different in inspired and expired air?inspired and expired air?

Answer: Respiration uses oxygen and produces Answer: Respiration uses oxygen and produces carbon dioxide and water. Thus, the expired carbon dioxide and water. Thus, the expired

air contains air contains less oxygenless oxygen and and more carbon more carbon dioxide and waterdioxide and water

You cannot live without You cannot live without doing it.doing it.BREATHINGBREATHING

CLUE:

Objective 7Objective 7

To define what breathing isTo define what breathing is

BREATHING AND RESPIRATIONBREATHING AND RESPIRATION

Is breathing and respiration the same?Is breathing and respiration the same? Respiration is a chemical process.Respiration is a chemical process. In aerobic respiration, we need oxygen.In aerobic respiration, we need oxygen. How do we get the oxygen?How do we get the oxygen?

BREATHINGBREATHING Inhaling (breathe in) takes in oxygenInhaling (breathe in) takes in oxygen Exhaling (breathe out) takes out carbon Exhaling (breathe out) takes out carbon

dioxide and waterdioxide and water

BREATHINGBREATHING

Breathing is a mechanical process Breathing is a mechanical process

DEFINITION OF BREATHING: DEFINITION OF BREATHING: Mechanical process by which oxygen enters the Mechanical process by which oxygen enters the

lungs from the air outside and carbon dioxide is lungs from the air outside and carbon dioxide is removed from the lungs into the environmentremoved from the lungs into the environment

Objective 8Objective 8

To know what happen during breathing in and To know what happen during breathing in and outout

BREATHING INBREATHING IN

Ribs swing upwards and outwardsRibs swing upwards and outwards Diaphragm moves downward and flattenDiaphragm moves downward and flatten

BREATHING OUTBREATHING OUT

Ribs return to original positionRibs return to original position Diaphragm relaxes and arches upwardsDiaphragm relaxes and arches upwards

Objective 9Objective 9

To compare between respiration and breathingTo compare between respiration and breathing

Respiration and breathingRespiration and breathing

RespirationRespiration BreathingBreathing

Takes place all the timeTakes place all the time Takes place all the timeTakes place all the time

Take place in every cellTake place in every cell Take place in the lungsTake place in the lungs

A process that breaks down A process that breaks down food to release energyfood to release energy

A process of gaseous A process of gaseous exchange with the exchange with the

environmentenvironment

Uses oxygen obtained from Uses oxygen obtained from breathingbreathing

Takes in oxygen from Takes in oxygen from environmentenvironment

Produces carbon dioxideProduces carbon dioxide Removes carbon dioxide Removes carbon dioxide produced during respirationproduced during respiration

Objective 10Objective 10

To understand how the human respiratory To understand how the human respiratory system workssystem works

Objective 11Objective 11

To explain how plants take in oxygen and To explain how plants take in oxygen and remove carbon dioxideremove carbon dioxide

Plant Respiratory SystemPlant Respiratory System

Plants respire all the time just like other living Plants respire all the time just like other living organismsorganisms

During the day plant respire as well as During the day plant respire as well as photosynthesizephotosynthesize

During the night photosynthesis cannot take During the night photosynthesis cannot take place, plant only respire.place, plant only respire.

Oxygen is taken in and carbon dioxide is Oxygen is taken in and carbon dioxide is released through the stomatareleased through the stomata

Objective 12Objective 12

To differentiate between photosynthesis and To differentiate between photosynthesis and respirationrespiration

PhotosynthesisPhotosynthesis RespirationRespirationProcess that makes foodProcess that makes food Process that breaks down food to Process that breaks down food to

release energyrelease energy

Takes place in plants onlyTakes place in plants only Takes place in all living thingsTakes place in all living things

Takes place only when there is Takes place only when there is lightlight

Takes place all the timeTakes place all the time

Needs chlorophyllNeeds chlorophyll Does not need chlorophyllDoes not need chlorophyll

Takes in carbon dioxideTakes in carbon dioxide Gives out carbon dioxideGives out carbon dioxide

Gives out oxygenGives out oxygen Takes in oxygenTakes in oxygen

Takes in and stores energyTakes in and stores energy Energy is releasedEnergy is released

Uses carbon dioxide and waterUses carbon dioxide and water Uses glucose and oxygenUses glucose and oxygen

End products – glucose and End products – glucose and oxygenoxygen

End products – carbon dioxide End products – carbon dioxide and waterand water

Takes place in chloroplastsTakes place in chloroplasts Takes place in mitochondriaTakes place in mitochondria