1 A blood clot that forms inside one of your veins or arteries is called a thrombus. A thrombus may also form in your heart.  A thrombus that breaks loose and travels from one location in the body to another is called an embolus.
The kidneys. The kidneys do vital work in the body filtering blood removing waste into urine, and balancing electrolyte levels. Our blood in our bodies passes through the kidneys several times a day. The kidneys are located at the back of the abdomen. Each kidney is about the size of a fist - 10-12.5cm long.
Prognosis of Kidney Failure. The kidneys are bean-shaped organs located on either side of the lower back. They are extremely important for the body in that they process waste and toxins before they are sent to the bladder as urine. If the kidney becomes damaged or fails completely, it becomes unable to properly process this waste.