But you are different than your friends. Maybe your hair is black and their hair is brown. Arthropods have diferences, too. An ant and a lobster are both arthropods. But they are different.
Ants are in a different group from lobsters.
They're both arthropods, but an ant is an insect . A lobster is a crustacean . Insects and lobsters both have exoskeletons, but a lot of other things about them are different. There are five different groups of arthropods. You can tell the difference between the five groups if you count the body parts.