Worms
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invertirbrate
an animal that doesn’t have a backbone
parasite
an organism that lives on or in another organism
host
a living cell that a parasite lives in
bilateral symmetry
cut into 2 equal parts
hermaphodrite
male and female parts
flatworms
they are from the phylum platyhelminthes, they are flat, they live in land or water, they have one opening, most are parasites, and they have bilateral symmetry
roundworms
they are from the phylum nematoda, they are round with pointed ends, they live in land or water, many parasites, they have two openings, and they have male and female worm
segmented worms
they are from the phylum annelida, they have rings/segments, that have two openings, they live in soil, and they have bilateral symmetry