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 largest of its many rivers is the Thukela. Durban is one of the fastest-growing urban areas in the world. Its harbour is one of the busiest in South Africa and one of the 10 largest in the world.Richards Bay is an important coal-export harbour.he largest of its many rivers is the Thukela. Durban is one of the fastest-growing urban areas in the world. Its harbour is one of the busiest in South Africa and one of the 10 largest in the world.