This is because iron is used to make a protein called hemoglobin. This protein helps blood cells carry oxygen around the body.
The answer is actually true, because its a tiny spot in the center of the retina that contains only cones.
Answer:
I think it is Ants but I am not sure..
Mitochondria :) your welcome
The answer is first to last with the labels going in and out of order to get an explanation
