Why do multicellular organism need a transport system like the blood and lymphatic system?

Multicellular organisms require transport systems like the blood and lymphatic systems to efficiently distribute nutrients, oxygen, and hormones to cells throughout the body, facilitating cellular metabolism and growth. These systems also play a crucial role in removing waste products and carbon dioxide, maintaining homeostasis. Additionally, the lymphatic system is essential for immune responses, helping to transport immune cells and remove pathogens. Overall, these systems ensure that all cells receive the necessary substances to function properly, which is vital for the organism's survival.