Now, the hemoglobin proteins, as well as the remnants of the red blood cell that lies can be either picked up by the macrophage circulating in our blood plasma or it ends up being released by the kidneys to the outside environment. So let's focus on the macrophage and what happens inside the macrophage. So let's suppose the macrophage either engulfs the red blood cell or picks up the remnants of the lyst red blood cell that was found in the blood plasma. Either way, the recycling process begins to actually take place. So the main component of the red blood cell are these hemoglobin proteins. So this describes the recycling of hemoglobin inside the macrophage.