Final answer:
The respiratory and circulatory systems work together to provide oxygen to the body's tissues and remove carbon dioxide. The respiratory system conducts gas exchange, while the circulatory system transports the gases to and from tissues.
Step-by-step explanation:
The functions of the respiratory and circulatory systems are closely interlinked, affecting one another significantly. The respiratory system is responsible for the exchange of gases with the external environment, providing oxygen to the blood and removing carbon dioxide from it. The circulatory system, comprising the heart, blood vessels, and blood, then transports this oxygen-rich blood from the lungs to the body's tissues for cellular respiration, and in the process, collects carbon dioxide to be expelled from the body via the respiratory system. Hence, these two systems work together to maintain vital body functions, delivering oxygen and removing wastes from the body's cells.