The circulatory system is similar to a road & highway system because the circulatory system is a way for nutrients and other stuff to flow through to your muscles, brain and organs (The nutrients and stuff are like cars). The blood veins, and vessels are like the roads that direct the stuff to the places they need to be.
The circulatory system is like a road or highway system because the circulatory system is a way for nutrients and other stuff to flow through to your muscles, brain and organs need to be. <3 :)
