Final answer:
The respiratory system exchanges gases between the body and the outside air, taking in oxygen and releasing waste gases such as carbon dioxide. It works closely with the cardiovascular system to transport oxygen and remove carbon dioxide from the body.
Step-by-step explanation:
The respiratory system is responsible for exchanging gases between the body and the outside air. It takes in oxygen and releases waste gases, such as carbon dioxide. The respiratory system works closely with the cardiovascular system to transport oxygen to body cells and remove carbon dioxide from the body.