Platyheminthes -Flatworms |
Charateristics
- dorsol ventral muscles keep worms flat
- flat body stucture is to distribute food and nutrients to the whole organism- the cells are close by
- aruicle- lobe of head contains 2 brain lobes
- acelomates
- cephalized amimals - has a head
- bilateral symetry
- has sensory organs
- eyespots- oselli simple eyes
Central Nervous System
Digestion System
- incomplete digestion (ineffiecent)
- one opeing the mouth
- food is carried through the pharynx
- then into the gastrovasular cavity
- then is aborbed by the flatworm
Excratory System
- protenphedria- kidney like function
- flame cells
Reproduction
- Sexual- (hermaphrodites) monecious- has both sexes
- Asexual- transverse budding
Three Classes
- Turbellaria (turbellians)
- Free living
- Some are mutialistic- Bdelloura
- Trematoda (flukes)
- Cestoda (tapeworms)
Class Turbellaria (turbellaria) can be mutialistic
Slide 35 Planaria digestive tract
SLide 34 Dugesia
Class Trematoda (flukes) parasitic
Schistoma japanica
Schistoma mansoni
Schistoma hemotubim (blood fluke
Slide 36 Fascila hepatica sheep liver fluke
Cysts of flukes in muscle of animals
Clonorchis sinensis (chinese blood fluke)
Slide 37
Slide 36 Fasci
Class Cestoda (Tapeworms) parasitic
Life cycle
Reproduction of Tapeworm
Taenia
Matture Proglottid "Gravid" -full of eggs slide 38
Scolex- part of tape worm that attaches to intestine wall
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