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Notes On Annelida

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Published in: Biology
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CHARACTERISTICS OF ANNELIDA

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  1. CHARACTERISTICS OF ANNELIDA 1. They are also known as ringworms or segmented worms. 2. They have long and segmented body. 3. They are bilaterally symmetrical. 4. They are triploblastic. 5. They are mostly aquatic, some are terrestrial. 6. Body is elongated and metamerically segmented. 7. They exhibit organ level organization. 8. They respire through their body surface. 9. They are coelomate. Digestive system is complete and developed. 10. Excretory and nervous system are present. 11. They have closed circulatory system. 12. They are invertebrates. 13. Fertilization may be internal or external. 14. 15. Sexes may be separate or united. 16. Development is direct with no larval stages. Nereis Earthworms 3.238 Examples o' Annelids Leech