platyhelminthes (flatworms, tapeworms)raiken/courses/inactive/1001new/...trematoda - flukes -...
TRANSCRIPT
![Page 1: PLATYHELMINTHES (flatworms, tapeworms)raiken/Courses/INACTIVE/1001new/...Trematoda - flukes - vertebrate parasites Platyhelminthes - Classification 2. Trematoda - flukes Platyhelminthes](https://reader031.vdocuments.net/reader031/viewer/2022021621/5ca9395388c993db388b4dae/html5/thumbnails/1.jpg)
Diversity of Life – Animals
PLATYHELMINTHES (flatworms, tapeworms)
![Page 2: PLATYHELMINTHES (flatworms, tapeworms)raiken/Courses/INACTIVE/1001new/...Trematoda - flukes - vertebrate parasites Platyhelminthes - Classification 2. Trematoda - flukes Platyhelminthes](https://reader031.vdocuments.net/reader031/viewer/2022021621/5ca9395388c993db388b4dae/html5/thumbnails/2.jpg)
Porifera
Cnidaria Ctenophora Platyhelminthes Rotifera
Nematoda Nemertea Mollusca Annellida Arthropoda Bryozoa
Phoronida Brachiopoda Echinodermata Chordata
No true tissues
radial symmetry diploblastic
true tissues
Acoelomates
Deuterostomes
Bilateral symmetry triploblastic
Body cavity
Protostomes
Lophophorate phyla
Pseudocoelomates
Coelomates
A Phylogeny of the Animal Phyla
![Page 3: PLATYHELMINTHES (flatworms, tapeworms)raiken/Courses/INACTIVE/1001new/...Trematoda - flukes - vertebrate parasites Platyhelminthes - Classification 2. Trematoda - flukes Platyhelminthes](https://reader031.vdocuments.net/reader031/viewer/2022021621/5ca9395388c993db388b4dae/html5/thumbnails/3.jpg)
Platyhelminthes - flatworms
• Description Animals that are • triploblastic • no body cavity(aceolomate) • central nervous system • bilateral symmetry
![Page 4: PLATYHELMINTHES (flatworms, tapeworms)raiken/Courses/INACTIVE/1001new/...Trematoda - flukes - vertebrate parasites Platyhelminthes - Classification 2. Trematoda - flukes Platyhelminthes](https://reader031.vdocuments.net/reader031/viewer/2022021621/5ca9395388c993db388b4dae/html5/thumbnails/4.jpg)
Platyhelminthes - flatworms
Free living flatworms Tapeworms
Flukes
![Page 5: PLATYHELMINTHES (flatworms, tapeworms)raiken/Courses/INACTIVE/1001new/...Trematoda - flukes - vertebrate parasites Platyhelminthes - Classification 2. Trematoda - flukes Platyhelminthes](https://reader031.vdocuments.net/reader031/viewer/2022021621/5ca9395388c993db388b4dae/html5/thumbnails/5.jpg)
There can be two
Ectoderm
Endoderm
or three
Mesoderm
Diploblastic Triploblastic
Tissue Layers
![Page 6: PLATYHELMINTHES (flatworms, tapeworms)raiken/Courses/INACTIVE/1001new/...Trematoda - flukes - vertebrate parasites Platyhelminthes - Classification 2. Trematoda - flukes Platyhelminthes](https://reader031.vdocuments.net/reader031/viewer/2022021621/5ca9395388c993db388b4dae/html5/thumbnails/6.jpg)
Body Cavities
Coelomate - the coelom is lined on both sides with mesoderm
Pseudocoelomate - the coelom (= pseudocoelom) is lined on one side with mesoderm
Acoelomate - there is no body cavity between the digestive tract and body wall
3. Body Cavities - There are three different kinds
![Page 7: PLATYHELMINTHES (flatworms, tapeworms)raiken/Courses/INACTIVE/1001new/...Trematoda - flukes - vertebrate parasites Platyhelminthes - Classification 2. Trematoda - flukes Platyhelminthes](https://reader031.vdocuments.net/reader031/viewer/2022021621/5ca9395388c993db388b4dae/html5/thumbnails/7.jpg)
Platyhelminthes - flatworms
Basic Structure - body plan
endoderm mesoderm ectoderm
Acoelomate!!
![Page 8: PLATYHELMINTHES (flatworms, tapeworms)raiken/Courses/INACTIVE/1001new/...Trematoda - flukes - vertebrate parasites Platyhelminthes - Classification 2. Trematoda - flukes Platyhelminthes](https://reader031.vdocuments.net/reader031/viewer/2022021621/5ca9395388c993db388b4dae/html5/thumbnails/8.jpg)
Platyhelminthes - flatworms Basic Structure - a few improvements
Excretion
![Page 9: PLATYHELMINTHES (flatworms, tapeworms)raiken/Courses/INACTIVE/1001new/...Trematoda - flukes - vertebrate parasites Platyhelminthes - Classification 2. Trematoda - flukes Platyhelminthes](https://reader031.vdocuments.net/reader031/viewer/2022021621/5ca9395388c993db388b4dae/html5/thumbnails/9.jpg)
Platyhelminthes - flatworms
Basic Structure - a few improvements
Digestion
-digestion begins in the pharynx and nutrients are absorbed in the gastrovascular cavity
![Page 10: PLATYHELMINTHES (flatworms, tapeworms)raiken/Courses/INACTIVE/1001new/...Trematoda - flukes - vertebrate parasites Platyhelminthes - Classification 2. Trematoda - flukes Platyhelminthes](https://reader031.vdocuments.net/reader031/viewer/2022021621/5ca9395388c993db388b4dae/html5/thumbnails/10.jpg)
Platyhelminthes - flatworms
Basic Structure - a few improvements
Nervous system
Eyespots
![Page 11: PLATYHELMINTHES (flatworms, tapeworms)raiken/Courses/INACTIVE/1001new/...Trematoda - flukes - vertebrate parasites Platyhelminthes - Classification 2. Trematoda - flukes Platyhelminthes](https://reader031.vdocuments.net/reader031/viewer/2022021621/5ca9395388c993db388b4dae/html5/thumbnails/11.jpg)
Platyhelminthes - flatworms
Basic Structure - a few improvements
Nervous system
Cephalization
![Page 12: PLATYHELMINTHES (flatworms, tapeworms)raiken/Courses/INACTIVE/1001new/...Trematoda - flukes - vertebrate parasites Platyhelminthes - Classification 2. Trematoda - flukes Platyhelminthes](https://reader031.vdocuments.net/reader031/viewer/2022021621/5ca9395388c993db388b4dae/html5/thumbnails/12.jpg)
Platyhelminthes - Classification
1. Turbellaria - free living flatworms -mostly marine, predators and scavengers
![Page 13: PLATYHELMINTHES (flatworms, tapeworms)raiken/Courses/INACTIVE/1001new/...Trematoda - flukes - vertebrate parasites Platyhelminthes - Classification 2. Trematoda - flukes Platyhelminthes](https://reader031.vdocuments.net/reader031/viewer/2022021621/5ca9395388c993db388b4dae/html5/thumbnails/13.jpg)
Platyhelminthes - Classification
2. Trematoda - flukes - vertebrate parasites
![Page 14: PLATYHELMINTHES (flatworms, tapeworms)raiken/Courses/INACTIVE/1001new/...Trematoda - flukes - vertebrate parasites Platyhelminthes - Classification 2. Trematoda - flukes Platyhelminthes](https://reader031.vdocuments.net/reader031/viewer/2022021621/5ca9395388c993db388b4dae/html5/thumbnails/14.jpg)
Platyhelminthes - Classification 2. Trematoda - flukes
![Page 15: PLATYHELMINTHES (flatworms, tapeworms)raiken/Courses/INACTIVE/1001new/...Trematoda - flukes - vertebrate parasites Platyhelminthes - Classification 2. Trematoda - flukes Platyhelminthes](https://reader031.vdocuments.net/reader031/viewer/2022021621/5ca9395388c993db388b4dae/html5/thumbnails/15.jpg)
Platyhelminthes - Classification
3. Cestoda (= Cestoidea) - tapeworms - vertebrate parasites
![Page 16: PLATYHELMINTHES (flatworms, tapeworms)raiken/Courses/INACTIVE/1001new/...Trematoda - flukes - vertebrate parasites Platyhelminthes - Classification 2. Trematoda - flukes Platyhelminthes](https://reader031.vdocuments.net/reader031/viewer/2022021621/5ca9395388c993db388b4dae/html5/thumbnails/16.jpg)
Platyhelminthes - Classification
3. Cestoda (= Cestoidea) - tapeworms - vertebrate parasites
Hooks- for attachment to host’s intestine
Sucker discs
Scolex
![Page 17: PLATYHELMINTHES (flatworms, tapeworms)raiken/Courses/INACTIVE/1001new/...Trematoda - flukes - vertebrate parasites Platyhelminthes - Classification 2. Trematoda - flukes Platyhelminthes](https://reader031.vdocuments.net/reader031/viewer/2022021621/5ca9395388c993db388b4dae/html5/thumbnails/17.jpg)
Platyhelminthes - Classification
3. Cestoda (= Cestoidea) - tapeworms - vertebrate parasites
proglottid
![Page 18: PLATYHELMINTHES (flatworms, tapeworms)raiken/Courses/INACTIVE/1001new/...Trematoda - flukes - vertebrate parasites Platyhelminthes - Classification 2. Trematoda - flukes Platyhelminthes](https://reader031.vdocuments.net/reader031/viewer/2022021621/5ca9395388c993db388b4dae/html5/thumbnails/18.jpg)
Platyhelminthes - Classification 3. Cestoda - tapeworms- Beef tapeworm- Life cycle
Mature adult in human intestine
Larvae release in sewage
Juveniles encyst in cow muscle
![Page 19: PLATYHELMINTHES (flatworms, tapeworms)raiken/Courses/INACTIVE/1001new/...Trematoda - flukes - vertebrate parasites Platyhelminthes - Classification 2. Trematoda - flukes Platyhelminthes](https://reader031.vdocuments.net/reader031/viewer/2022021621/5ca9395388c993db388b4dae/html5/thumbnails/19.jpg)
Platyhelminthes - Classification 3. Cestoidea - tapeworms- Beef tapeworm- Life cycle
![Page 20: PLATYHELMINTHES (flatworms, tapeworms)raiken/Courses/INACTIVE/1001new/...Trematoda - flukes - vertebrate parasites Platyhelminthes - Classification 2. Trematoda - flukes Platyhelminthes](https://reader031.vdocuments.net/reader031/viewer/2022021621/5ca9395388c993db388b4dae/html5/thumbnails/20.jpg)
Platyhelminthes - Classification 3. Cestoda - tapeworms- Beef tapeworm- Life cycle
Mature adult in human intestine
Larvae release in sewage
Juveniles encyst in cow muscle
![Page 21: PLATYHELMINTHES (flatworms, tapeworms)raiken/Courses/INACTIVE/1001new/...Trematoda - flukes - vertebrate parasites Platyhelminthes - Classification 2. Trematoda - flukes Platyhelminthes](https://reader031.vdocuments.net/reader031/viewer/2022021621/5ca9395388c993db388b4dae/html5/thumbnails/21.jpg)
Symmetry Body Cavity
Skeletal Digestive Excretory Nervous Reproductive
Porifera None None Spicules in mesohyl
Phagocytosis Amoebocytes None Hermaphrodites Asexual
Cnidaria Radial None None – stiffened mesoglea
Nutritive muscle cells
Non e Nerve net Specialized zooids or asexual
Platyhelminthes Bilateral None (acoelo-mate)
None Incomplete Flame cells Cephalized CNS
Hermaophrodite Asexual