Dong vat hoc 01

Phylum Annelida
Segmented Worms
Body divided into repeating segments
Sedentary
Terrestrial
Earthworm
Feed on Blood
Leech
Myxozoa
Arthropoda
Annelida
Mollusca
Lophophores
Hemichordata
Vertebrata
Other
pseudocoelomates
Nematoda
Porifera
Ctenophora
Cnidaria
Placozoa
Platyhelminthes
Nemertea
Ciliophora
Sarcomastigophora
Microspora
Apicomplexa
Mesozoa
Echinodermata
Crustacea
Chelicerata
Uniramia
Other Chordata
Phylum Annelida
Segmented body
metameric
Setae
Absent in leeches
Coelom divided by septa
Closed circulatory system
Nephridia for each segment (metamere)
Circulatory Systems
Prostomium
Pygidium
Peristomium
Metamerism
Trochophore larva
Apical tuft
Mouth
Anus
Ciliary band
Stomach
Annelid development
Class Polychaeta
Many setae
Parapodia
Class Polychaeta
Polychaete Worm
Predatory
Jaw
Everted pharynx
Eye
Cirrus
Palp
Tentacle
Parapodium
Nereis
Class Polychaeta
Class Polychaeta
Fireworm
Sedentary Polychaete Lugworm
Pelagic* Polychaete
*Drift in the open ocean
Class Oligochaeta
Few setae
Clitellum
No parapodia
Monoecious
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External Structures of an Earthworm
Lumbricus terrestris
Feed on decaying organic matter
Enrich soil
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Internal Structures of an Earthworm
Body wall
Epithelium
Circular muscle
Longitudinal muscle
Ventral vessel
Dorsal
vessel
Bladder
Nephridiopore
Nephrostome
Metanephridium
Fig. 17.14
Earthworm Reproduction
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Class Hirudinea
Anterior & posterior sucker
No setae
Most live in fresh water
Feed
Invertebrates
Body fluids
Blood
The End