RESPIRATORY SYSTEM

Air

Parts of System

Breathing

Nitrogen (78%)

Oxygen (21%)

Carbon dioxide, water vapour, other gases (1%)

Nose

Windpipe

Lungs

Tiny hairs

Filter dust away

Breathe in

Exchange of gases

Less carbon dioxide

Less water vapour

Less heat

Breathe out

More oxygen

Diaphragm moves down

Chest space/volume increases

Air enters lungs

Exchange of gases

Diaphragm moves up

Non-humans

Fish

Gills

Filaments

Plants

Stomata

Open

Photosynthesis

Carbon dioxide taken in

Enters blood

More carbon dioxide

Removed from blood

Oxygen give out

Close

Hot weather

Less water loss

Increased surface area

Exchange of gases