An arthopod is not a 'thing' with a function within something... It is a an invertebrate animal having an exoskeleton (external skeleton), a segmented body, and jointed appendages.
All arthopods do not have backbones which makes all arthopods invertebrates!
arthopods
Exoskeletons.
the normal ones
The malpighian tubule system is located near the intestine of arthropods. The function of the malpighian tubule system is excretory.
Arachnids such as spiders and scorpions have chelicerae.
they are all jointed
Gill
Arachnids, Crustations, Millipedes, Centipedes, Insects
Yes lobsters are invertebrates, as are all Arthopods.
Sponges, Cnidarians, Mollusks, and Echinoderms are not Arthropods.
arthopods