No, it means "jointed legs". ^^
Grasshoppers and crickets
Annelids are segmented in much the same way as arthropods (think of earthworms). Primitive arthropods include centi- and millipedes, with many unspecialized legs (legs in more advanced arthropods often specialized to form antennae, mandibles and pedipalps), and they're as long and thin as segmented worms. Also, there's a possible 'intermediate form', Peripatus, the velvet worm, being long, thin and soft-skinned, but also having many stubby legs!
Well, actually, arthropods don't have jaws, but I know what you mean. Arthropods have mandibles. Mandibles open side to side, which is great for slicing and tearing!
no, i dont know what they are, but they are not arthropods
NO. Arthropods do not have a 4 chambered hearts.
their spiny skin
A sea cucumber is a soft-bodied animal, not a spiny-skinned animal.
The scientific name for spiny-skinned animals, such as sea urchins and sea stars, is Echinodermata. This phylum includes marine organisms with a calcareous endoskeleton covered by spines or plates.
A spiny skinned invertebrate is called a sand dollar. That is because they are are echinoderms (a type of invertebrate),
no
Echinoderm means "Spiny-Skinned" in Greek. For more information, look at "What does echinoderms mean in greek?"
Starfish
it lives in the sea
Hedgehog or porcupine
spiny skinsthey regeneratethey have tube feet to move around
Echinoderms
Echinoderm