| A | B |
| excretory system | system that includes the digestive system, respiratory system, urinary system and the skin |
| urinary system | system that rids the blood of waste and excess water |
| kidneys | regulate water and waste by filtering the blood |
| renal artery | transports blood containing water & materials to the kidney |
| renal vein | transports filtered blood out of the kidney |
| renal pelvis | collecting area for urine from tubules |
| nephron | cuplike structure where everything but blood cells and large proteins are filtered from the blood |
| ureter | transports urine to the bladder |
| urinary bladder | stores urine |
| urethra | transports urine from the bladder to the outside of the body |
| hypothalamus | area in the brain that produces a hormone that determines how much urine is produced |
| kidney stones | small, solid particles that form in the area where the urine funnels into the ureter |
| kidney dialysis | artificial filtering of the blood when the kidneys do not work properly |
| skin | largest organ in the human body |