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Blood goes to the lungs oxygen poor and comes out of the lungs oxygen rich.
an oxygen molecule is inhaled and then goes through the blood
oxygen.
You breath.
the oxygen goes to the air sacs inside of the lungs.
oxygen goes into your lungs and then co2 comes out when mixed with a substance in your lungs.
into the skin
The oxygen goes into your lungs, then into your blood stream. Then carbon dioxide goes into your lungs and thats when you exhale. Oxygen changes to carbondioxide in your body.
the oxygen in your blood comes from the air you breath in . It goes in through your mouth into the lungs and the oxygen gets taken out from the lungs into the cappilaries.
The mouth or nose inhales oxygen. Then the oxygen goes into the lungs.
in a fetus blood does not reach the lungs for purification. In a baby blood goes to the lungs for oxygenation.
The oxygen poor blood (not enough oxygen) goes to the lungs to get more oxygen to turn into oxygen rich blood (has plenty of oxygen)