Platyhelminthes
By: Alex Thornton, Kris Dick,
Alyssa Milligan
• Type of symmetry
• Bilateral
• Movement
• Controlled by a longitudinal, circular, and oblique layers of muscles
• Some by slime trails by the beating of epidermal cilia
http://www.darwinsgalapagos.com/animals/blue_flatworm.jpg
http://www.ryanphotographic.com/images/JPEGS/Swimming%20flatwor
m,%20Raja%20Ampat,%20West%20Papua%20IMG_2259.jpg
• Nervous System
• Longitudinal nerve cords that are interconnected across the body by transvers
braches
• Two simple brains and eye spots to help sense light
• Cephalized nervous system
• Digestive system
• Two-way
• Food goes into a gut then back out after so much time has passed
http://classconnection.s3.amazonaws.com/1613/flashcards/698929/jpg/lab-4b-51a.jpg
• Excretory system
• Flame cells
Flame cell
• Circulatory system
• Osmosis/ diffusion
• Respiratory system
• Osmosis/ diffusion
https://www.youtube.com/watch?v=Rb_3KIB4CmE
• Skeletal system
• None
• Reproductive system
• Sexually and asexually
• Hermaphrodites
https://www.youtube.com/watch?v=9G2LkTBnGhQ
Types of Platyhelminthes
• Turbellaria- Flat worms that live in tropical, moist hot environments
Types of Platyhelminthes
Trematoda- (Flukes) live in intense conditions
Types of Platyhelminthes
Cestoda- Parasitic Flat worms (Tape Worms)
Cephalization
Concentration of sense of organs, nervous control. At the anterior end
of the body during evolution in the course of an embryos development
Contraction of tape worm
• Animals
• Raw meat
Platyhelminthes: Planarian Diagram
Tapeworms
Flukes
Work Cited
• http://crescentok.com/staff/jaskew/isr/botzo/planschm.gif (planarian diagram)
• http://www.theepochtimes.com/n3/eet-content/uploads/2013/08/tapeworm_iowa-676x450.jpg (tapeworm1)
• http://www.dogbreedinfo.com/images14/TapewormImg_1391.jpg (tapeworm2)
• http://people.bethel.edu/~kisrob/VirtualBiology/Planaria/Chlonorchis_sinensis.jpg (fluke1)
• http://www.gc.maricopa.edu/biology/lsola/Bio182/labreview/platyhelminthes/Fluke.jpg (fluke2)
• http://faculty.clintoncc.suny.edu/faculty/michael.gregory/files/Bio%20102/Bio%20102%20Laboratory/Animal%20Diversity/Lophot
rochozoans/img041.jpg (fluke 3)
• http://classconnection.s3.amazonaws.com/670/flashcards/276670/jpg/planarian21338524926696.jpg
• http://www.savalli.us/BIO385/Diversity/05.PlatyhelminthesImages/LiverFlukeL.jpg
• http://media.eol.org/content/2013/12/16/00/06092_580_360.jpg
• http://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&docid=W4l3krMO8A5uGM&tbnid=Z7H8_jW9rsYBNM:&
ved=0CAYQjB0&url=http%3A%2F%2Fwww.pet-informed-veterinary-advice-online.com%2FTaenia.html&ei=7OAuVKLCcHluQT0sYGQDw&psig=AFQjCNGuY6Q9YZ-D_PbMeFMxqyKG01bjzA&ust=1412444603882599
• http://www.advancedaquarist.com/2002/5/short_album/Chelidonura-feeding-from-Ca.
• http://s1.ibtimes.com/sites/www.ibtimes.com/files/styles/v2_article_large/public/2013/08/20/flatworm.jpg?itok=4rGvhGoW
•