Annelids body is segmented. Segmentation is the key character of Annelida.

1. General characteristics
of
Annelida

2. Agenda
Introduction
Key Characteristics
General Characteristics
Example
Summary

3. Introduction
Annelus: little ring

4. Key Personality
Segmented
(metamerism)

5. Scientific classification
Kingdom: Animalia
Note
All animals are members of the Animalia

6. Habitat
mostly aquatic, some are terrestrial
Note
Habitat: Natural environment of an animal

7. Habit
free living
Note
Habit: Behavior

8. Symmetry
bilateral symmetry
Note Symmetry: Repetition of the parts in an animal

9. Coelom
coelomate
Note
Body cavity: true coelom, often divided by internal septa

10. Grade of organization
organ system grade

11. Germ layer
triploblastic
Germ layer
endoderm
(inner layer)
ectoderm
(outer layer)
mesoderm
(middle layer)
Note
Tri: Three (3)

12. Digestive system
complete & developed

13. Respiration
general body surface

14. Nervous system
nervous system with an anterior
nerve ring, ganglia & a ventral nerve
chord

15. Circulatory system
true closed circulatory system

16. Excretion
nephridia

17. Reproduction
Sexual & gonochoristic / hermaphoditic
Reproduction
Sexual Asexual

18. Fertilization
Internal / external
Fertilization
Internal external

19. Development
direct
Note
no larval stages

20. Example
Nereis,
Syllis,
Pheretima,
Tubifex,
Hirudinaria,
Dinophilus, Protodrilus

21. Summary
Segmented (metamerism)

22. Thank You
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