33. Arthropod identity card.
How are arthropods
characterized according to
examples of representing
beings, basic morphology,
type of symmetry, germ layers
and coelom, digestive system,
respiratory system, circulatory
system, excretory system,
nervous system and types of
reproduction?

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!
Examples of representing :
cockroaches, flies, crabs, ,
shrimps, spiders, scorpions, . Basic
morphology: segmented
(metameric), articulated limbs,
exoskeleton, periodic ecdysis.
of symmetry: bilateral.
layers and coelom: ,
coelomates. Digestive system:
. Respiratory system: tracheal
insects, branchialin crustaceans,
and book lungs arachnids.
Circulatory system: , hemocyanin
in crustaceans arachnids. Excretory
system: tubules in insects,
glands in crustaceans,
tubules and coxal in arachnids.
Nervous : ganglial. Types of
: sexual, with or
larval stage in and crustaceans,
metamorphosis some insects,no
larval in arachnids.