Worm Phyla: Platyhelminthes, Nemertea, Nematoda, Annelida,Pogonophora, Onycophora + Rotifera Flashcards

Terms Definitions
Platyhelminthes is the phylum name for which type of worm
Flat worm
What level of organisation are the platyhelminthes
Organ level
How many tissue layers do the flat worms have
3 they are triploblastic
what type of symmetry do the flat worms have
bilateral symmetry
cephilization means
to show some sort of head formation
platyhelminthes have which type of guts
Two way or No Gut
flat worms are acelomate or ceolomate
what type of nervous system to they have
a ladder-like nervous system
protonephridia is a word for
primitive kidneys
the flatworms protonephridia are used for
osmoregulation (water cleaning)
what are the 3 classes undre the Flat Worms
Turbolaria, Trematoda, Cestoda
free living planarians are the class
Parasitic flukeworms are what class under the flatworms
explain the life cycle of Clonorchis sinesis
humans excrete eggs in feces and snails eat them. eggs hatch into MERACIDIUM and it turns into a SPOROCYST. sporocysts turns into REDIA larva. redia hatches out CERCARIA larvae (tadpole like). cercaria leave snails and into fish and turn into METACECARIAL cysts. humans eat fish, metecercarial into adult.
the cestoda are characterized by
presence of scolex and proglottids
scolex and proglottids are what
head and mouth, the segments that compose the cestoda
another name for the phylum Nemertea is
ribbon worms
the nemerteans resemble what class of worm under the platyhelmintes except in that
the turbolareans; they have a one way gut
the Nematoda are
non segemented roundworms
some Nematoda are
Ascaris and Trichinella
Nematodes are Organ system level, triploblastic and have bilateral symmetry what else sets them apart
they are pseudocoelomates, hydrostatic skeleton, and are covered by a non-living cuticle for protection
what are the 3 body parts of the Rotiferas
Head, Trunk, Foot
Nematoda and Rotifera are both
Organ system level, one way gut, bilateral symmetry and pseudocoelomates
The special ffeaturs of the Rotifera are
the Corona and Mastax (pharynx)
the Corona is
the ciliated mout part on the head that bring food in.
tube worms that live in hydrothermic vents are
these worms lack digestive tract as adults
Pogonophorans house thse
Chemautotrophic bacteria
Leeches, earth worms and polychaetes belong to this phyla
What sets the Annelids apart
they are protostome, segmented, have serial homology, and closed circulatory system
what do annelids have in common with most other worms
organ system level, one way gut, bilateral symmetry
there are three classes under the Annelids they are
Polychaeta, Oligochaeta, Hirudinea
the Polychaeta inclue the
the feather like structures on the polycheata are called
Setae (used for motility)
the common earthworm is part of this Class
unlike the Polychaeta the Oligochaeta have
a Clitellum
Leeches are part of this Clas
Onycophoras includes which worms
Velvet worms
the Onycophorans are like the Annelids in that they
are at the organ system level, triploblastic, have one way gut, are coelomates, are protostones, and are segment
the Onycophorans differ from annelids in that they have what type of featueres
Arthropod-like features
what type of arthropod-like features do Onycophorans have
growth by shedding (ecdysis), highly reduced coelome, trachea-spiracular system
Onycophorans have what type of 'feet'
unsegmented and lobopodea
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