Platyhelminthes Quick Quiz: How long are the longest flatworms? <http://clean-water.uwex.edu/pubs/clipart/critters.plan.htm> Quick Quiz: How long are the longest flatworms? Eugene Lee, Hyun Seok Lee

What Are Platyhelminthes? Named because their bodies are thin between the dorsal and ventral surfaces Platyhelminth Eugene Lee

Sample Animal: Blood Fluke Blood Fluke (Schistosoma Mansoni) Trematoda Schistosomiasis, a disease whose symptoms include pain, anemia, and dysentery. <http://georgiafaces.caes.uga.edu/graphicsfiles/LandPlanarian33hr.jpg> Eugene Lee

Sample Animal: Pseudoceros dimidiatus Turbellaria Yello/Black Stripes with Orange Edge Found in Indo-Pacific, Red Sea <http://www.waterworxbali.com/Images/Photos/Large/pseudoceros-dimidiatus.jpg> Eugene Lee

4 Classes of Platyhelminthes Turbellaria Monogenea Trematoda Cestoda Schistosoma(Blood flukes) <http://img2.scoop.co.nz/stories/images/0304/eec6749f6646c81b6298.jpeg> Hyun Seok Lee

Body Symmetry/Cavity None. No Skeletal System! Callioplana marginata Eugene Lee <http://www.daveharasti.com/nelsonbay/seaslugs/flatworms/callioplana_marginata.jpg>

Locomotion/Musculature Uses Cilia on their ventral epidermis Some other turbelarians use their muscles Hyun Seok Lee

Nervous System Eyespots (Sensory Structure) Ventral Nerve Cords Ganglia <http://kdhellner.tripod.com/id17.html> Eugene Lee

Excretory/Digestive System Simple excretory apparatus A combination digestive/excretory system Mouth Hyun Seok Lee <http://kdhellner.tripod.com/id17.html>

Circulatory System Gastrovascular cavity Eats small worms, insects, and microscopic matter Eugene Lee

Reproduction Hermaphroditic Hyun Seok Lee <http://highered.mcgraw-hill.com/sites/dl/free/0078664276/281029/ccq_ch12_q4a.gif> Hyun Seok Lee

Gas Exchange Diffusion Hyun Seok Lee <http://1.bp.blogspot.com/_8S5FnilQeWM/R02wga5Iy0I/AAAAAAAAAA8/CGecy2kqb9Q/s320/48842.jpg> Hyun Seok Lee

Hyun Seok Lee, Eugene Lee Quiz What processes are occurring during gas exchange and excretory system? How do flatworms reproduce? Through what process? How do flatworms carry out excretory and digestive system? Name 4 classes of Platyhelminthes Hyun Seok Lee, Eugene Lee

Hyun Seok Lee, Eugene Lee Answers: Diffusion Asexually Through pharynx/Vastrovascular cavity Turbellaria, Monogenea, Tremattoda, Cestoda Hyun Seok Lee, Eugene Lee