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 worldâs longest river has two main branches â the White Nile, which flows 4,230 miles from its remotest central African sources to the Mediterranean, and the Blue Nile, which rises high up on the Ethiopian plateau and flows for 1,450 miles. The two parts then join at Khartoum by which time the White Nile has flowed some 2,500 miles.