Ants have six legs, and at the end of each leg there is a hooked claw that allows the ant to climb and hang on to things. The second half of an ant's body is the mesosoma, and it is full of muscles that power its legs. Ants can run fast for their size because of those muscles.
Ant anatomy has slight variations depending on the species and whether it's male or female. Worker ants tend to be stronger than hive ants because worker ants must carry food and supplies back to the hive. All worker ants are females that cannot reproduce; worker ants are never male. Because an ant does not have a grasping foreleg, it must use its mandibles to carry things. They are also used for biting, crushing, cutting, digging and hunting, making them an ant's most important tool.