The water cycle, also known as the hydrologic cycle or the H2O cycle, describes the continuous movement of water on, above and below the surface of the Earth. Although the balance of water on Earth remains fairly constant over time, individual water molecules can come and go, in and out of the atmosphere.
OBJ: Olusegun Obasanjo (president of Nigeria) OBJ: Official Black Jester (website)
Ureteropelvic junction (UPJ) is the point where the ureter joins the kidney. Ureteropelvic junction (UPJ) obstruction. The point where the ureter joins the kidney is called the ureteropelvic junction. If urine is blocked here, only the kidney swells. The ureter remains at a normal size. UPJ obstruction usually only occurs in one kidney.