How are the circulatory, respiratory, and lymphatic systems related to each other?

By carrying substances to cells and waste products away from cells.

The cardiovascular system pushes blood through the lungs where the respiratory system replenishes the oxygen and removes waste carbon dioxide. Both are needed to deliver blood with life giving oxygen to our tissues. The lymphatic system handles excess fluid from organs and transports the fluid back into the circulatory system, so both lymph and circulatory systems work together to balance fluid levels and keep our organs functioning.