Sentence:  his quill drawings had a scratchiness , suggesting skin texture ; the clay he used plastically to suggest soft moving flesh , as in an <WSD>abdomen</WSD> , in a reclining torso ; the wax he smoothed over to give the body surface an elastic pull . 
Meaning of the word marked with <WSD> tags:  the region of the body of a vertebrate between the thorax and the pelvis