Concept:Blood transports essential substances around the body, but not waste products already formed as urine.Explanation:Blood carries nutrients from the digestive system to body cells.Blood carries oxygen from the lungs to the body cells.Blood carries carbon dioxide from the body cells to the lungs for removal.Urine is formed in the kidneys and is not carried by the blood as urine; it is removed through the urinary system.Answer:I, III and IV only.Correct option: D