Click here to find the answer. Insects are a small part of a large group of animals called arthropods . Some things are different. Some things are the same. You have hair and arms, just like your friends.
All arthropods have one thing that is the same.
Arthropods have one big bone on the outside of their bodies. It is called an exoskeleton . This exoskeleton is like a large shell. It protects them and gives them shape. Ants and lobsters have one thing in common - they have exoskeletons .