Arthropods
Cephalopods
Bivalves
Annelids
Gastropods
Crustaceans
Echinoderms
Asymmetric symmetry
Bilateral symmetry
Radial symmetry
Open circulatory
Closed circulatory
Water-vascular system
Fluid filled
The kind of foot they have
The kind of shell they have
How they reproduce
Whether or not they have a shell
Spiracle
Crop
Setea
Radula
Setea
Radula
Tube feet
Gills
Open circulatory
Closed circulatory
Fluid filled
Water vascular
Nervous systems
Body cavity
Three body segments
Mouth and anus
Exoskeleton
Mantle
Shell
Skin
4
6
8
10
Arachnids
Worms
Insects
Crustaceans
Bilateral
Asymmetrical
Radial
Spherical
Setea
Exoskeleton
Tube feet
Radula
Metamorphosis
Direct development
Crop
Radula
Setea
Tube feet
Egg
Larva
Pupa
Nymph
Adult
Egg
Larva
Pupa
Nymph
Adult
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