awesome stuff
movement of limbsgives it it's formmovement of appendagesit protects the arthopodit camouflages the artropod
fiddler crab, lobster, crayfish, horseshoe crab, spider crab, hermit crab, barnalcles, mole crab, mosqitos
Turtles are vertebrates (phylum Chordata, the chordates) as they have an internal skeleton including a spinal (vertebral) column or backbone. By contrast, phylum Arthropoda (the arthropods) are characterized by exoskeletons made from chitin, segmented bodies, and jointed appendages; along with other differences, they do not have backbones like turtles.
Any number. 'Arthropod' simply means 'jointed leg' (think of 'Arthritis - inflammation of the joints, and tripod - something with 3 legs). The term Artropod is reserved for invertebrate creatures ( creatures without a backbone) that have jointed legs. These include: Insects (Insecta) (6 legs) Spiders and mites (arachnids) (8 legs) and also includes, at the other end of the spectrum centipedes and millipedes (with many dozens of legs). The only common thread between them is that all have legs that are jointed. THE BASIC ARTHROPODS ARE CENTIPEDES, MILLIPEDES, SPIDERS, AND MITES