Three main problems that can cause a luxating patella. 1  The first abnormality that is usually present is a trochlear groove that is too shallow. In order for the patella not to jump out of this tract, the groove must be deep enough to accommodate and cradle the patella as it moves up and down in the groove.
The longest river in South Africa is the Orange River which starts off life in the Drakensberg Mountains and works its way westwards to Alexander Bay and then onto the west coast of South Africa.
The Egyptians revered the Nile, and even had a celestial counterpart for it in the night sky â the Milky Way. The Nile is the longest river in the world, flowing 6695km (4184 miles). There are two main rivers which flow from the south into what is referred to as the Nile Proper, the Blue Nile, and the White Nile.The White Nile is the longer of the tributaries, but the Blue Nile is the main source of water and fertile soil.he origins of the White Nile are in deep central Africa, as far south as southern Rwanda. The river flows north through Tanzania, Lake Victoria, Uganda and into Southern Sudan. The Blue Nile flows about 1,400 km (850 miles) to Khartoum from Lake Tana 1,800 meters above sea level in the Ethiopian Mountains.