Anthropoda
An arthropod is an invertebrateanimal having an external skeleton Arthropods are members of the phylum Arthropoda and include the insects, arachnids, crustaceans, and others. Arthropods are characterized by their jointed limbs.
Scorpion
Scorpions are predators within the class Arachnida. They have eight legs and are easily recognized by the pair large scary claws and the skinny and sometimes poisonous tail. Scorpions use the muscular system because of how they move around. Another big way that they use their muscles is by protecting themselves with their claws and tail.
Crab
Crabs also predators in the arthropoda class this is becasue they are one of the most dangerous anthropodas. They are usually found in ocean or on the shore. Crabs have eight legs and can be recognized by their two large claws and their shell like body shape. Crabs are very similiar to scorpions in the way that they use their muscles they use them to move in their legs and they also use them to protect themselves and catch food with their claws.
Centipede
Centipede are arthropods with one pair of legs per body segment. Cenitpedes have from 20-300 legs all together. Centipedes also always have an odd number of legs. Centipedes use the muscular system by having to move all of their legs. It takes alot of muscle power to move all of those legs. This is how centipedes us the muscular system.