2. The Unsegmented Worms

3. TEKS 8C Identify the characteristics of the animal kingdom
10A Interpret the functions of the body systems
11B Identify how organisms respond to stimuli

4. Characteristics of Worms
Bilateral symmetry
Cephalization
Have organs
Parasitic or free-living

5. Phylum Platyhelminthes: Flatworms
Have no coelom
No respiratory or circulatory systems

6. Phylum Platyhelminthes: Flatworms
Reproduce sexually or asexually

7. Phylum Platyhelminthes: Flatworms
Class Turbellaria
Ex. Planaria
Free-living
Two eyespots
Lateral lobe

8. Phylum Platyhelminthes: Flatworms
Class Turbellaria
Ganglia
Mouth, no anus
Pharynx
Intestine
Flame cells

9. Phylum Platyhelminthes: Flatworms
Class Turbellaria
Reproduction
Asexual
regeneration
Sexual
hermaphrodites

10. Phylum Platyhelminthes: Flatworms
Class Trematoda
Ex. Flukes
Internal parasites
Cuticle
2 suckers
Incomplete digestive system

11. Phylum Platyhelminthes: Flatworms
Class Cestoda
Ex. Tapeworms
Internal parasites
Proglottids

12. Phylum Platyhelminthes: Flatworms
Class Cestoda
Scolex
No mouth or digestive system

13. Phylum Platyhelminthes: Flatworms
Class Cestoda
Reproduction
hermaphrodites

14. Tapeworms in the intestines

15. Phylum Nematoda: Round Worms
Pseudocoelem
Free-living or parasitic
Ganglia
Have mouth and anus
Digestive system
Not hermaphrodites

16. Pinworms
Endoscopy of colon

17. Trichinella

18. Hookworms under the skin

19. Parasitic Eye Worms

21. Dracunculus

22. Heart Worms

23. Elephantiasis – caused by filarial worms that blocks lymph vessels in body