Answer: The respiratory system works directly with the circulatory system to provide oxygen to the body. Oxygen taken in from the respiratory system moves into blood vessels that then circulate oxygen-rich blood to tissues and cells.
They usually consist of speed, strength, endurance, and agility tests. They will most likely have you do a timed shuttle run test, pull-ups, push-ups, sit-ups, and another type of speed/agility test. Hope this helps!