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.
How long is the river nile by km? The length of the Nile River is 7,088 km or 4,405 miles from its source in Nyungwe National Park of Rwanda to its mouth in Egypt. The River Nile is about 6670 km (4160 miles) in length and is the longest river in Africa and in the world.