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.
Congo River is the deepest river in the world and the second longest river in Africa. The river ranks as the â¦ ninth longest river in the world with its overall length of 4,700 km. The famous Boyoma Falls or Stanley Falls is in Congo River. The Chambeshi River in Zambia is regarded as the source of the Congo River.