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In humans, gas exchange and gas transport occur as a result of the functioning of a system of


A: Phloem tubes

B: Lungs and blood vessels

C: Ganglia

D: Setae

Verified Answer :

the answer is B) Lungs and blood vessels. 
the blood take fresh oxygen throughout the body and removes the old. the lungs give the oxygen to the blood

B.) lungs and blood vessels.



- When we inhale atmospheric air, through the nose it go to the trachea
and then via bronchus and bronchioles it ultimately go to the alveolus
where exchange of different gas takes place.


               --hope that i helped you very well--

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