29. How are the three main
arthropod classes
characterized according to the
body division?

Gap-fill exercise

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!
In crustaceans and the head
is with the thorax the
cephalothorax. Their thus is
divided cephalothorax and
abdomen.

insects there are , thorax and
abdomen.