Answer:
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.
Explanation:
hope it will help you
1. = G
2. = B
3. = H
4. = C
5. = I
6. = A
7. = D
8. = F
9. = E
Answer: after organelles it cells,tissues,organs,organ system then it give you the last one which is organism.
