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.
Major Rivers in Africa The four major rivers of Africa are the Nile (4,160 miles), the Congo (2,900 miles), the Niger (2,590 miles), and the Zambesi (1,700 miles). The Nile River is the longest river in the world. It is formed by the confluence of the Blue Nile River, which rises in the highlands of Ethiopia, and the White Nile River, which begins in the headwaters of