I would offer: The circulatory system, the nervous system including all the sensory systems, the respiratory system, the lymph system, the alimentary/digestive systems.
Urethra
Yes, they are the super highways for everything going through the body... well maybe small highways, because the arteries are the super highways.
About 15 highways
Auxiliary Interstate Highways and Primary Interstate Highways
4 Highways are in Hawaii.
There is no patron saint of highways.
Highways Highways (401)
The country that has the most highways is the Netherlands. Belgium has the second highest number of highways in the world.
There are many highways throughout California. Interstate 5 and 80 are the major highways in the state. Both highways run through the capital of Sacramento.
The possessive form for the plural noun highways is highways'.
USA - 830 highways
The ISBN of Highways to a War is 0855616423.