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.
1 Nile river is 4184 miles long. 2  The Nile Riverâs average discharge is about 300 million cubic metres per day. 3  Crocodiles are very common along the banks of the Nile River.4  Fishing Eagles are a common bird along the Nile. 5  The Nile stretches north for approximately 4,000 miles from East Africa to the Mediterranean. The length of the river is approximately 6695 km and the river has two tributaries. 2  Only 22% of the river passes through Egypt, the other countries through which Nile passes are Sudan, Burundi, Ethiopia, Zaire, Kenya, Uganda, Rwanda and Tanzania.