Final answer:
The cardiovascular system and respiratory system work together to supply body cells with oxygen and eliminate carbon dioxide.
Step-by-step explanation:
The cardiovascular system and respiratory system work together to supply body cells with oxygen and to eliminate carbon dioxide. The respiratory system absorbs oxygen in the lungs and transports it through blood vessels to cells where it is needed for cellular respiration. At the same time, carbon dioxide produced by cells is carried to the respiratory system for removal from the body.