Most animals have a head (with the mouth and most sense organs), a body, and limbs — legs, wings or fins — that they use to move. Many also have a tail.
Examples
Example 2.5 (Count the legs)
Legs come in numbers worth counting. The blackbird walks on legs, the cat on , the ladybug on , the spider on — and the earthworm and the snail have no legs at all, yet they still get where they are going.