The reflex pathway consists of retinal ganglion cells, which convey information from the photoreceptors to the optic nerve which connects to the pretectal nucleus of the high midbrain. It bypasses the lateralgeniculate nucleus and the primary visual cortex.
The River Nile is about 6,670 km (4,160 miles) in length and is the longest river in Africa and in the world. Although it is generally associated with Egypt, only 22% of the Nileâs course runs through Egypt.
The longest river in the world is the Nile River, it reaches around 6650 kilometers in length (4132 miles). More Nile River facts. The second longest river in the world is the Amazon River, it reaches around 6400 kilometres in length (4000 miles). More Amazon River facts. The longest river in the USA is the Missouri River, stretching around 2,340 miles (3,770 km) in length (slightly longer than the Mississippi River).