The three worm phyla are Annelida, Platyhelminthes, and Nematoda. In the activity below, test your knowledge of the three worm phyla.
animal phylum that includes roundworms
Nematoda
animal phylum that includes flatworms
Platyhelminthes
animal phylum that includes segmented worms
Annelida
the only worm phylum that contains worms with a coelom
Annelida
worm phylum that includes animals without a respiratory or circulatory system because their bodies are so thin
Platyhelminthes
two worm phyla that include mostly parasites
Platyhelminthes and Nematoda
bristle-like structures found on some Annelids
setae
all worms have this type of body symmetry
bilateral
How are Annelids beneficial to soil?
Annelids include earthworms, which aerate and fertilize soil.
paddle-like appendages found on some Annelids
parapodia
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