Red Blood cells take oxygen to the working muscles as it is required for respiration.
To all of the other cells of your body that need oxygen to live.
the lung is where the hemoglobin take up the oxygen and the blood cells re-oxygenate
They inject it from pores and outside cells
The red blood cells have that function.
White
White
until the cells run out of oxygen
the red blood cells
blood takes the impurities and carbon dioxide from the cells.
oxygen
oxygen and nurtients