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 longest river in the world is the Nile River. The River flows from south to north. It beings in the mountains of East Africa and streches over 4160 miles and (6695) km until it flows to the Mediterranean Sea to the North. The Most fertile parts stretches of this river is connected between northern Sudan and ancient Nubia and southern Egypt.