Simplify the following text for a Grade 7 native English-speaking person.
Original: Like all insects , beetles ' bodies are divided into three sections : the head , the thorax , and the abdomen .
Simplified: In common with other insects , there are three main parts to a beetle 's body : the head , the thorax ( the middle part ) , and the abdomen ( the back part ) . On the head , beetles have antennae ( feelers ) , eyes , and a mouth .