Download Platyhelminthes

Platyhelminthes
<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
<http://www.daveharasti.com/nelsonbay/seaslugs/flatworms/callioplana_marginata.jpg>
Eugene Lee
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
<http://kdhellner.tripod.com/id17.html>
Hyun Seok Lee
Circulatory System
Gastrovascular cavity
Eats small worms, insects, and microscopic
matter
Eugene Lee
Reproduction
Hermaphroditic
<http://highered.mcgraw-hill.com/sites/dl/free/0078664276/281029/ccq_ch12_q4a.gif>
Hyun Seok Lee
Gas Exchange
Diffusion
<http://1.bp.blogspot.com/_8S5FnilQeWM/R02wga5Iy0I/AAAAAAAAAA8/CGecy2kqb9Q/s320/48842.jpg>
Hyun Seok 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
Answers:
Diffusion
Asexually
Through pharynx/Vastrovascular cavity
Turbellaria, Monogenea, Tremattoda, Cestoda
Hyun Seok Lee, Eugene Lee