Ocean going vessels can sail about 3,700 kilometres up the Amazon to Iquitos, in Peru
it was easier to travel upstream
steamboats
Welll lol
Travel upstream
It is an Egyptian word for travel which meant to go upstream
the blood travel through blood vessels is the Artrium or atria. :-)
There are no locks along the Amazon River. The river is mostly navigable due to its depth and width, allowing vessels to travel its entire length without the need for locks.
periostium
The Amazon flows from the Andes to the Atlantic Ocean.
blood vessels
a lock is a system that allows ships to travel upstream and down stream
there are rapids not very far upstream