Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!

Platyhelminthes are worms flat
bodies (flatworms), are
worms with but not
segmented (roundworms).
Annelids are worms with
segmented (they are
metameric).