Gas exchange
The respitory and cardiovascular systems work to bring oxygen to cells and remove carbon dioxide by gas exchange. We inhale air through our lungs then it passes into our bloodstream to be used in respiration... and carbon dioxide is a waste product so it passes out of the blood and then is breathed out. Then the gases (Cabron dioxide and oxygen) pass in or out of the blo0dstream by diffusion.
Hope this helped ya have a good day bro cya)
