Answer:
The correct answer is "respiratory system" and "circulatory system."
The respiratory system is responsible for gaseous exchange, which involves the inhalation of oxygen and the exhalation of carbon dioxide. The circulatory system transports oxygen-rich blood from the lungs to the cells and then transports carbon dioxide-rich blood back to the lungs, where it is expelled through exhalation.
The urinary system and nervous system are not directly involved in the expulsion of carbon dioxide. The urinary system is responsible for the removal of waste products from the body in the form of urine, while the nervous system regulates a variety of bodily functions.