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17 Cards in this Set

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What are the three phyla of worms?
flatworms, roundworms, and segmented worms
Are all worms invertebrates?
yes
Do worms have specialized tissues that form organs and organ systems.
yes
What type of symmetry do worms have?
bilateral symmetry
Why can worms respond quickly to their environment?
because they have a brain
Do many species of worms have separate make and females sexes?
yes
Planarians, flukes and tapeworms are what kind of worms?
flatworms
What is a parasite?
an organism that gets its food from living in or on another organism.
Which parasite has no digestive system of its own?
tapeworm
What is one worm predator that hunts for food?
planarian
How many openings do planarians have to their digestive system?
one opening
Are all roundworms parasites?
no, only some.
How many openings do round worms have to their digestive system?
two openings, one at each end.
What type of worm are earthworms and leeches?
segmented worms
How many openings do segmented worms have to their digestive system?
two openings
Do segmented worms have a closed or open circulatory system?
closed
How do earthworms breathe?
through their skin