Breathing
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what is breathing
breathing is a process of taking in air and removing it from the body
why is oxygen important
oxygen is important as it is needed to release the energy trapped
what does the air we breathe in contain
oxygen
where does the oxygen go to in the body
oxygen enters the blood and is transported to body cells
what is respiration
respiration is a process where oxygen combines with digested food molecules in the body cells to release the energy stored
what is the word equation for respiration
oxygen + digested molecules = energy + carbon dioxide + water
what is carbon dioxide
carbon dioxide is produced during respiration and removed when we breathe out
what is inhaled air
inhaled air is the air we breathe in
how can we test for carbon dioxide
we can test for the presence for carbon dioxide in exhaled air by bubbling it into limewater
how would we know if there is carbon dioxide present in exhaled air
if the lime water turns chalky
how can we test for the presence of water vapour in exhaled air
by exhaling air into cobalt chloride paper
how would we know if there is water vapour present in exhaled air
if the water turns from blue to pink
why does exhaled air contain more water vapour than inhaled air
the air sacs in our lungs contain a thin layer of moisture which will evaporate and be exhaled as we breathe out