People almost have seen snails. They sometimes move slowly and sometimes sleep in their shells. The biggest snail’s body is more than ten inches long. The hot sunshine and heavy rain will hurt a snail’s body, so a snail shrinks(缩小) its body into the shell under these circumstances. A snail can sleep for as long as it needs to. It sleeps in its shell for a whole winter.
The snail wakes up in springtime. It comes out from the shell. When they are hungry, they look for food. Their eyes are at the top of feelers(触须). The snails’ eyes are very weak. But the sense of smell is very strong. It helps snails to find food. The snail’s mouth is smaller than the point of a pin(针). However, it has 25,600 teeth! The teeth are so small that you can’t see them. If you put a snail in a paper box, it will eat its way out! If a snail wears out its teeth, it will grow new ones.