Write the character of the Annelida
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Annelus: little ring)Kingdom: AnimaliaHabitat: mostly aquatic, some are terrestrialHabit: free living
Symmetry: bilateral symmetryCoelom: coelomate (Body cavity is a true coelom, often divided by internal septa)
Body is metamerically segmentedGrade of organization: organ system gradeGerm layer: triploblasticBody possesses 3 separate sections, a prosomium, a trunk and a pygidium.Digestive system: complete and developedRespiration: by general body surfaceNervous system: nervous system with an anterior nerve ring, ganglia and a ventral nerve chord.Circulatory system: Has a true closed circulatory system.Excretion: by nephridiaReproduction: Sexual and gonochoristic or hermaphoditic.Fertilization: Internal or externalDevelopment: direct with no larval stages
Symmetry: bilateral symmetryCoelom: coelomate (Body cavity is a true coelom, often divided by internal septa)
Body is metamerically segmentedGrade of organization: organ system gradeGerm layer: triploblasticBody possesses 3 separate sections, a prosomium, a trunk and a pygidium.Digestive system: complete and developedRespiration: by general body surfaceNervous system: nervous system with an anterior nerve ring, ganglia and a ventral nerve chord.Circulatory system: Has a true closed circulatory system.Excretion: by nephridiaReproduction: Sexual and gonochoristic or hermaphoditic.Fertilization: Internal or externalDevelopment: direct with no larval stages
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1) They are aquatic , terrestrial.
2) They are free living and
ectoparasites.
3) Body is triploblastic , bilaterally
symmetrical and coelomate.
4) Body is metamerically segmented.
5) Digestive system is complete.
6) Circulatory system is of closed type.
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