Get their distinctive coloration through the protein hemoglobin. Hemoglobin will help the red blood cells produce the oxygen other cells want to supply energy. More return move might be generated through the movement of skeletal muscles, which often can compress veins and push blood through the valves in veins https://bloodcastlemuonline58876.blogmazing.com/35359899/the-smart-trick-of-blood-castle-mu-online-that-nobody-is-discussing