Phylum Arthropoda, Echinodermata, Chordata

The largest animal phylum- 1 million species of crabs, shrimp, spiders, scorpions and insects make up this phylum Have jointed appendages; segmented bodies Exoskeletons made of chitin Molt;  have heads with many sensory organs. Bilateral Simple and complex eyes that detect only light intensity and form images Antennae that smell chemical substances in the environment…