What component of blood is responsible for transporting waste to the liver and kidneys?

Blood is the primary component responsible for transporting a variety of substances throughout the body, including metabolic waste products. The circulatory system, which consists of blood, is designed to transport waste materials produced by cells to the liver and kidneys for processing and excretion. The liver plays a significant role in detoxifying chemicals and metabolizing drugs, while the kidneys filter blood to produce urine, eliminating waste products from the body.

Platelets are involved in blood clotting and do not play a role in waste transport. White blood cells are part of the immune system, focusing on defending the body against infections and diseases, rather than transporting waste. Hemoglobin is a protein within red blood cells that carries oxygen from the lungs to the body and carbon dioxide from the body back to the lungs, but it is not directly responsible for waste transport to the organs that filter and eliminate waste. Therefore, the comprehensive function of blood makes it the correct answer in this context.