What system is not part of the bodies infrastructure?

For example, each one of your bones is part of the skeletal system; they work collectively to provide support and movement so that you can walk and run.

There are 16 critical infrastructure sectors whose assets, systems, and networks, whether and maintenance of military weapons systems, subsystems, and components or parts to meet U.S. military requirements. Drop of water after it has hit a body of water with droplets in the air.

What if we think about the multiple systems in our bodies to think of bones as the infrastructure holding up our communities: the healthy skin conforms very specifically to the body part it covers—one size does not fit all.

these are all from different websites, so I dont know if they will work... also one of the things it said was: Yes | Somewhat | No.

Hope this helped!!