A group of cells that work together to perform a common function
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, Proteins is the correct answer
The kidney in a human body is located <span>underneath the diaphragm. This is near the lower back
hope this helps!</span>
