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Ascaris sp. dissection
Ascaris sp. cross section female
Ascaris sp. cross section male
Ascaris sp.
Trichnella sp.
Trichnella sp.
Necator americana
Necator americana
Rhabditis
Rhabditis
Enterobius sp. female
Enterobius sp. male
Enterobius sp.
Anguilla aceti
Anguilla aceti
rotifers
rotifers
acanthocephalans
acanthocephalans
horsehair worms
horsehair worms
Kingdom: Animalia
Phylum: Nematomorpha
digestive system is degenerate
parasitic (arthropods)
simple (no internal organs)
various roundworms
various roundworms
Kingdom: Animalia
Phylum: Nematoda
found in virtually all habitats and biomes
dioecious