Chapter 1 Health

I think that the Circulatory, Respiratory, Digestive, and Excretory systems are considered transport systems because your food travels down and out (if you know what I mean), and your air and oxygen travel down, around, and back up, so they transport from 1 place to another while the organs help different things go to one place to another. But each system help each other out,and they all make up your insides, and help you stay alive. And it helps you get rid of your way and transport it from food to waste, and it helps you flush out your system, and get rid of the things that can make you sick, as well as dead skin and stuff like that. Basically, you need your body systems and all that stuff to keep your water content balanced, as well as everything else balanced, by transporting things in and out of your body. So I think that is why they are considered transport systems.