Answer:
haemoglobin
Explanation:
Inside the air sacs, oxygen moves across paper-thin walls to tiny blood vessels called capillaries and into your blood. A protein called haemoglobin in the red blood cells then carries the oxygen around your body
Answer:
Making a hypotheses and performing experiments
I Hope this helps you uwu
Explanation:
Answer:
https://phys.org/news/2009-05-bird-songs-environment.html
Explanation: