WORM PHYLA
Platyhelminthes
Turbellaria
-free livin flatworms
-live in freshwater, marine, and terrestrial forms too
Trematoda-Flukes
-flukes
-have suckers to attach to host and ingest body fluids
- have a primary host where reproduction takes place
-secondary host harbor other stages
Cestatoda-tapeworms
-tapeworms
- the head which is the scolex has sucks to attach to host
- reproductive segments called proglottids
-nutrients absorbed directly from host- no digestive system
Nematoda
Ascaris
- females(8-16in.) bigger than males (4-6in.)
-Locomotion: thrashing back and forth movement
-parasitic
Hookworms
-intestinal parasites
- hooklike mouth parts which it uses to attach to walls of the gut
-feeds on blood
-parasitic
Trichinella
- cause disease when people eat undercooked meat
-form cysts
Filarial worms
-disease causing
-mosquitos help transport it
Pinworms
-infects when person scratches when sleep
Annelida
Oligochaeta-Earthworms
-nocturnal
-subterranean
-food chain: eaten by birds and other animals
Hirudinea-Leeches
- typically flattened