| A | B |
| darker outer part of kidney | cortex |
| lighter inner part of kidney | medulla |
| this takes place in medulla | reabsorption |
| this brings blood to kidney | renal artery |
| this can hold 800ml of liquid | bladder |
| funnel like tubes collects urine | renal pelvis |
| K & H ions move into kidney | secretion |
| fluid in the ureter | urine |
| this muscle controls urine flow | sphincter |
| takes purified blood away | renal vein |