How does the respiratory system in man work ?
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Answer Posted / aby tom
we can define respiration as exchange of O2 and co2 .
respiration starts and ends at same part of our body called
nostrils . differnce of air pressure between atmospere and
lungs was the main cause of respiration . respiration is
controled by our brain through intercoastal musles and
diafrom . when our body needs o2 brain inform inter coastal
musles and diafrom by that they contrats . at that time air
pressure in lungs is lower than atmospere . so the air gets
in through nose and reaches lungs . that air contains more
o2 . then air exchange happens . at that time lungs filled
with co2 containing air . at that time inter coastal musles
and diafrom releases because of that air pressure in lungs
increases than atmospere . so air gets out.
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