The term 'body trunks' refers to the torso, which is the part of the body between the neck and the hips. It is also known as the trunk or the torsos, which is a five-letter word. The torso is composed of the chest, abdomen, and back, and it is the main part of the body that supports the arms, legs, and head. It is also responsible for protecting the vital organs, such as the heart, lungs, and digestive system.