'One of the main jobs of red blood cells is to carry this gas from the lungs to the body's tissues'
oxygen
IT'S A GAS: One of the main jobs of red blood cells is to carry this gas from the lungs to the bodys tissues
One of the main jobs of red blood cells is to carry this gas from the lungs to the body's tissues
One of the main jobs of red blood cells is to carry this gas from the lungs to the body's tissues
IT'S A GAS
oxygen
IT'S A GAS