| A | B |
| kidney | the organ that removes urea, excess water and other wastes |
| ureter | the tube that carries urine from the kidney to the bladder |
| urinary bladder | the saclike organ that stores urine before it is eliminated from the body |
| nephron | small independent blood filtering unit in the renal cortex of the kidney |
| filtration | the process by which fluid from the blood filters into the nephron |
| readsorption | the process by which most of the material removed by the kidney is returned to the blood |
| urethra | the tube through which urine is released from the body |
| renal vein | the vessel that carries the cleaned blood away from the kidney |
| renal artery | the vessel that carries blood to the kidney to be cleaned |
| urea | the nitrogenous waste product toxic to the body |
| dialysis | process by which a machine is used to clean the blood because the kidneys are not funtioning |