Describe the indus river system

The Indus River is a major river in South Asia. It originates in Tibet, near Lake Manasarovar, and flows south down through Western Tibet, Pakistan, and India. It flows into the Arabian sea and is the longest river in Pakistan. It is the twenty-first largest river in the world. It is a major water source for the Pakistani people and contributes significantly to the Pakistani economy. It supports many industries as well as providing drinking water for the locals.

I know about it bcz my gf was from Pakistan.; p