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.
Hymn to the Nile. The Nile is with a length of 6,650 km the longest river in the world, its catchment area is huge, more than 3 million square kilometres with a mean annual rainfall of about 600 mm at present, yet its average discharge is with less than 3,000 m /s among the smallest of the great rivers.