what organ are these?
lungs
heart
liver
What do we breathe in?
CO2
Oxygen
what do we breathe out?
CO2
Oxygen
what delivers air to the lungs?
trachea
what sense helps us breathe?
sight
smell
taste
the stomach and intestines are a part of which process?
digestive system
respiratory system
where do we absorb nutrients?
nose and lungs
stomach and intestines
how many food groups are there in a balanced diet?
3
what are the four essential parts of the respiratory system?
nose, mouth, trachea, lungs
