| A | B |
|---|
| Kidneys | These 2 organs filter the liquid waste from the blood. |
| Ureters | These 2 tubes transport urine from the kidneys to the bladder. |
| Bladder | This sac is a reservoir for urine until the urine is excreted from the body. |
| Urethra | This tube transports urine from the bladder to the outside of the body. |
| Nephrons | There are more than 2 million of these microscopic filtering units in each kidney. |
| Glomerulus | This cluster of capillaries is the first part of the nephron, and it filters waste from the blood. |
| Renal artery | This blood vessel carries blood to the kidney where it will be filtered. |
| Renal vein | This blood vessel carries blood away from the kidney after it has been filtered. |
