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Your Heart,Lungs and Blood

This resource has been prepared for teachers who are teaching young students about

their hearts, lungs and blood.

Air rushes from

your nose and m

outh down

your windpipe into

your lungs.

Your blood carries the oxygen to every part of your body w

here it is needed.

In your lungs, oxygen is absorbed,

or soaked up, into your blood.

How does oxygen get into your body?

Air

WindpipeInside

a lungLung

When you’re running a race, your brain

tells your muscles to m

ove your bones fast!

You won’t get very far, though, unless

you can breathe.

To create energy, your muscles and other

body parts need a ga

s called oxyg

en.

You take in oxygen when you breathe in

air through your nose and mouth.

The faster you run, the m

ore oxygen your body needs to create energy.

So your brain tells you to breathe faster and faster until you are puffing and panting!

Pu

ffing

an

d P

an

ting

As blood flow

s through your body, it also collects a gas called carbon dioxide. T

his gas is poisonous to your body. Y

our blood carries this gas to your lungs. Y

ou then use your lungs to breathe the gas out.

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Heart

Vein

Artery

At the end of a race, you w

ill probably feel your heart beating fast. W

hy?

It’s your heart’s job to pump, or push,

your blood around your body.

Then your blood can carry oxygen from

your lungs to your m

uscles and other body parts.

Your heart usually beats, and pumps,

about 80 times each m

inute.

When you do exercise, it m

ust beat faster to deliver m

ore oxygen to make m

ore energy.

That’s w

hy when you m

ove around fast, your heart beats fast, too.

You

r Bea

ting

Hea

rt

Your blood has m

any im

portant jobs to do. For exam

ple, it delivers nutrients from

your food to where they

are needed in your body. T

ogether, nutrients and oxygen give you energy.

Your blood travels

around your body through thousands of

kilometres of tubes

called veins and arteries.

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What Is Blood M

ade Of?

What Is Blood M

ade Of?

The m

ain ingredient in your blood is a w

atery liquid called plasm

a.

Your blood also contains red blood cells and w

hite blood cells.

Your white blood

cells attack germs

and help you fight illnesses.

Red blood cells

deliver oxygen to cells that need it.

Oxygen

Red blood cell

Inside a blood vessel

White

blood cells

Red blood cells

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