| A | B |
| spiracles | breathing pores on insects |
| nephrons | coiled tubules that make up human kidney |
| trachea | air tubes in insects |
| elimination | getting rid of wastes |
| ammonia | nitrogen based wastes of water dwellers |
| deamination | removal of extra amino acid waste by liver |
| urea | nitrogen based waste of man, earthworms |
| uric acid | nitrogen based waste of grasshopper |
| contractile vacuole | water pump, rids water from protists |
| nephridia | paired excretory organs in earthworms |
| malpighian tubules | hair like tubes that excrete uric acid in a grasshopper |