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