1. Phylum PLATYHELMINTHES Platy = Flat Helminth = Worm

2. CHARACTERISTICS All show BILATERAL symmetry
Posses three tissue (germ) layers: Ectoderm 2. Mesoderm 3. Endoderm
Most exhibit CEPHALIZATION.
Majority Do NOT exhibit segmentation

3. TYPICAL FLATWORMS

4. GETTING FOOD
Some flatworms are free-living aquatic worms. They obtain their food from cruising around and feeding off of tiny living animals or scavenging off of recently dead animals.
Others are PARASITIC, they feed off of the blood, tissue fluids or tissue cells of their living host.

5. THREE CLASSES OF FLATWORMS
TURBELLARIA – Free Living Flatworms. Most common example : Planaria
TREMATODA – Parasitic Flatworms known as flukes, most are less than one centimeter.
CESTODA – Long Parasitic worms with hooks to attach to intestinal wall of host.

6. TURBELLARIA - Planarians

9. TREMATODA - Flukes

12. Section of Moose Liver Infected with Liver Flukes

13. LIFE CYCLE OF BLOOD FLUKE

14. CESTODA - Tapeworms

19. TAPEWORM REMOVAL

20. DEWORMING

21. Do You Have Pets? Do You Have Worms?
- Ever think you have rice in your stool/feces; but you haven’t had rice for a long, long time?