Why are red blood cells and plasma proteins not removed from blood during dialysis?

Red blood cells and plasma proteins are not removed during dialysis because the dialysis process is designed to filter out waste products and excess substances from the blood while retaining larger elements essential for health. The semipermeable membrane used in dialysis allows small molecules and waste to pass through but blocks larger components like red blood cells and proteins. This selective filtration helps maintain the necessary balance of blood components while effectively clearing toxins and excess fluids.