1. PYLUM ANNELIDA – segmented worms Biology 111

2. Annelids Representative species: common ____________

3. Annelids – Key characteristics! • Have a _________ – fluid filled body cavity surrounded by a mesoderm (room for organs) • Have a ____________ (membrane in the coelom in which all organs are attached) • Have 2 sets of muscle tissue. 1. body wall muscles – to move the worm called…..______ and 2. digestive system muscles to move food through the system called……______

5. Class Oligochaeta: Earthworms ``It may be doubted whether there are any other animals which have played so important a part in the history of the world as the earthworm.`` -Charles Darwin, 1881 http://mypeoplepc.com/members/arbra/bbb/id19.html

7. Class Oligochaeta: Earthworms • 2500 species • Many more cell layers than flat and round worms • Have _________ to carry gases to and from body tissues (circulation) • Blood in earthworms contains a red protein ___________ (just like in us!) • Have __ hearts near the anterior end

9. Earthworms cont… • More complex _____________ system than other worm phyla • They consume dirt (food and sand particles) via mouth, __________, esophogus, and then stores it in the __________. • After storage, food moves to the __________ to be ground down, then to the intestine for digestion and absorption into the blood stream. • Undigested food moves out the ________

10. Earthworm digestion http://www.youtube.com/watch?v=FK-Oo7NwPiQ

11. Earthworms cont… • _______ are bristles that aid in mvmt.; each segment has 4 setae (except first and last ones) • Complex NS • Reproduce _________ • Both sexes….Hermaphrodites

12. Class _______________ • First FDA approved animal for medicinal purpose: leeches (blood sucking parasites) – natural anticoagulant Hirudin http://www.youtube.com/watch?v=cePKpt5nOJ0

13. Class __________ – marine worms

14. Worm Grunting/Charming http://www.youtube.com/watch?v=VjRxUVLxdYI http://www.youtube.com/watch?v=IGviTYCFksE