Moluscs
-having a soft body and protected by a hard shell
-body without cavity
-has a pair of kidneys
Example: seahorse and snail
Athropods
-compound eyes(like flies)
-body are divided into segments
-the sexes nearly always seperate
Example: spiders and scorpions
Annelids
-they have no skeleton
-the brain is small and is located in under the pharynx
-the worms contain a thin water proof layer called cuticle
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Example: earthworm
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