1. Phylum Annelida
(segmented worms)

2. segmented worms, true coelom Includes: earthworm marine worms leeches
Characteristics
segmented worms, true coelom
Includes: 
earthworm
marine worms
leeches

3. Annelids -Annelida means “little rings”
-body segments separated by septum
Septum = internal wall
- some have bristles called setae
-have closed circulatory system
-have well-developed nervous system (brain)
-sexual reproduction, some are hermaphrodites
*See Earthworm Anatomy

4. Class Oligochaeta Class Oligochaeta – Earthworm
-Streamlined bodies (p. 697 fig )
-Few setae
-Live in soil or fresh water
-Castings - enrich soil, (worm poop)

7. Class Hirudinea Leeches -external parasites with suckers on each end
-medicinal uses (circulation, anti-clotting) 

9. Leeches being bred for medical uses.

10. Class Polychaeta -includes: sandworms, bloodworms, & relatives
Marine worms See p.698 fig.27-18
-includes: sandworms, bloodworms, & relatives
-have paired paddlelike appendages with setae

11. Nereis

12. Featherduster

13. Fireworm