The Phylum Arthropoda
The Phylum Arthropoda has the most amount of living organisms under its name. The group includes spidesrs, ticks, mites, centipedes, millipedes, crustaceans, insects and others. An arthropoda has a segmented body covered by an exoskeleton made from chitin. This can be used for protection and muscle attachment. Them having an exoskeleton also means that once they hatch from thier cocoon they can't get any bigger as an adult. quite the contrary with humans having an endoskeleton.The phylum name is from the body part of jointed appendages, this includes antennae and mouthparts as well as walking legs.