There was so many science subjects I had no clue to put this in so I think this one would make more sense)

In which part of the human respiratory system does actual oxygen exchange take place?

A.bronchi

B.trachea

C.diaphragm

D.alveoli

Question

There was so many science subjects I had no clue to put this in so I think this one would make more sense)

In which part of the human respiratory system does actual oxygen exchange take place?	
 
 A.bronchi
 
 B.trachea
 
 C.diaphragm
 
 D.alveoli

anonymous · Answer

D.alveoli :) Alveoli are like small sacks, and this is where oxygen is is put into the blood stream in exchange for carbon dioxide.