[Solved] What happens to the amount of cartilage in the walls of the respiratory tract as it moves down from the upper conducting zone to the lower respiratory zone? A) no change B) hypertrophies C) decreases D) thickens E) increases Necrophilia: is a sexual attraction to corpses, considered a paraphilic disorder by psychiatric standards. Sexual Activity: Behaviors that include or are aimed at deriving sexual pleasure, including intercourse and other acts. Corpse: A dead body, especially a human body to be disposed of following death. Voyeurism: A disorder or behavior characterized by gaining sexual pleasure from secretly observing unsuspecting people who are naked, disrobing, or engaging in sexual activity.