Question
List out various excretory organs in different animals.
| S.No. | Excretory Organs | Animals |
| 1. | Body surface | Sponges, cnidarians and echinoderms |
| 2. | Flame cells | Flatworms |
| 3. | Intracellular tubes | Roundworms |
| 4. | Nephridia | Annelids |
| 5. | Green glands | Crustaceans (prawn) |
| 6. | Malpighian tubules | Insects |
| 7. | Coxal glands | Scorpion and spiders |
| 8. | Kidneys | Molluscs and vertebrates |
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