The Mississippi-Missouri river system is the most extensive and navigable river system in the world.

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The Mississippi-Missouri river system, also known as the Mississippi River System, is the largest and most navigable in the world, stretching over 3,700 kilometers (2,320 miles) through the United States. It includes the Mississippi River, Missouri River, Ohio River, Tennessee River, and many other tributaries.

The Mississippi-Missouri River System Is the Most Extensive and Navigable