The Mississippi River and The Missouri River are the transportation arteries.
The Mississippi River is the transportation artery that travels from north to south in the United States. It is one of the longest rivers in North America and a key transportation route for goods and commodities.
Navigable.
It's called transportation.
Easy: Transportation is needed to make money right? You need it to make money. For example, like shipping important parts for a new invention.
dredging?
River Niger
An artery in the leg is called the "femoral artery."
Axillary artery
This artery is called the Aorta. It is the largest artery in the body.
The Danube River.
An artery, only an arteriole can be smaller
the largest artery is Aorta