| A | B |
| kidney | Organ that filters urea from the blood |
| urea | Ammonia and carbon dioxide form this in the liver |
| bladder | urine storage tank |
| urethra | urinary pathway out of the body from the renal pelvis |
| urine | Waste product of the kidneys. Urea + salts + water |
| ureter | Carries waste from the kidney to the bladder |
| glomerulus | small network of capillaries surrounded by Bowman's capsule |
| Loop of Henle | Hairpin shaped part of the convoluted tubule |
| Bowman's capsule | cup-shaped structure in the upper end of a nephron that encases the glomerulus |
| filtration | Movement of some of the plasma into Bowman's capsule |
| reabsorption | Returning of glucose, amino acids , etc. to the bloodstream |
| excretion | Removal of urine, salts, etc. from the body |
| convoluted tubule | Begins at the Bowman's capsule and ends at the collecting duct |
| collecting duct | Tubules empty into this |
| renal pelvis | Collecting duct empties into this |
| nephrons | filtering unit of the kidney |
| secretion | Movement of bad materials (urea) into the tubules |
| liver | where urea is formed from ammonia and CO2 |