Proteins don't give blood its color, the great amount of red blood cells do. Hence the name, they are red and give blood its color.
The arteries and veins of the body carry the blood.
Red blood cells.
haemaglobin
Hemoglobin.
Hemoglobin carries the oxygen in the blood and it gives the red blood cells their color.
Hemoglobin
Maybe blood cells? :0
It gives up oxygen, and carries out carbon dioxide.
Hemoglobin
glucose gives us energy, the blood carries the glucose to our muscles so they can move
It gives up oxygen, and carries out carbon dioxide.
blood chribates
The hemoglobin gives the cells its reddish hue and carries oxygen in the cell.