How does William S. Burroughs use imagery in Naked Lunch?

Imagery:

"You know how old people lose all shame about eating, and it makes you puke to watch them? Old junkies are the same about junk. They gibber and squeal at the sight of it. The spit hangs off their chin, and their stomach rumbles and all their guts grind in peristalsis while they cook up, dissolving the body's decent skin, you expect any moment a great blob of protoplasm will flop right out and surround the junk. Really disgust you to see it."

"I saw it happen. Ten pounds lost in ten minutes standing with the syringe in one hand holding his pants up with the other, his abdicated flesh burning in a cold yellow halo, there in the New York hotel room...night table litter of candy boxes, cigarette butts cascading out of three ashtrays, mosaic of sleepless nights and sudden food needs of the kicking addict nursing his baby flesh..."