1.  What are the three CLASSES of flatworms?  A flatworm does not have a body cavity so we call it an ________________  Flatworms have tissues and ______.  Roundworms have a false body cavity that we call a ______________.  A parasite lives off of a _______.

2. Phylum: Annelida Segmented worms…earthworms, leeches

3. Nutrition Earthworms eat dirt! 1.Dirt goes in the mouth with the help of the pharynx (pulls dirt in) 2.Down the esophagus (food tube)

4. 3.Into the crop (storage organ) 4.Then into the gizzard for grinding 5.Then the intestine where the nutrients can be digested 6.Finally out the anus (the end…literally!)

5. Respiration (breathing) Gas diffuses through the skin Why do all of the earthworms come out after it rains?

6. Circulation (blood) Closed system—blood flows in vessels Dorsal vessel carries blood to heart….5 pairs of AORTIC ARCHES. Ventral vessel carries blood away from heart

7. Nervous system Organs in anterior segments sense the environment –Brain Bundle of sensory nerves..Ganglion –Nerve Cord

8. Reproduction Hermaphrodites Exchange sperm with other worms Form a slimy cocoon from their CLITELLUM (band on their body) Band slides off and the babies are on their own

9. Movement Very slow! Muscles in each segment contract and relax Have bristles called SETAE which help them grip the soil

10. Excretory Nephridia—like kidneys –Remove wastes –Look like white stringy things in each segment

11. 1.Clams, Squid, snails are found in the phylum _________. 2.Earthworms and leeches belong to the phylum ________. 3.What is an closed circulatory system? 4.What does the crop do? Gizzard? 5.What do we call the “brain” of an earthworm? Write ?’s