(The term stallion for an uncastrated male horse dates from this time; stallion = stalled one.) Stallion is also used to refer to males of other equids, including zebras and donkeys.
Guide. Chronic kidney disease and acute kidney injury (also known as acute renal failure) cause the kidneys to lose their ability to filter and remove waste and extra fluid from the body. Hemodialysis is a process that uses a man-made membrane (dialyzer) to: 1  Remove wastes, such as urea, from the blood. 2  Restore the proper balance of electrolytes in the blood. 3  Eliminate extra fluid from the body.
Hemodialysis: Process of separating wastes from the blood by passage through a semipermeable membrane. Nephron: Filtering unit of the kidney. Urea: Chemical compound of carbon, hydrogen, nitrogen, and oxygen produced as waste by cells that break down protein. Ureter: Tube that carries urine from a kidney to the urinary bladder. Urethra: Duct leading from the urinary bladder to outside the body through which urine is eliminated.