Answer:
a website with .edu .gov or a book written by a famous professsor or scientist
Explanation:
Most of the metabolic work is in the:
Cell Body
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
C. perennial
hope this helps!
