How does Norman Mailer use imagery in The Executioner's Song?

Examples of Imagery:

"The apartment in Springville was not as nice as the house in Spanish Fork. It was just a two-room cinder-block apartment in a two-tier development of cheap apartments on a little old side street. There were kids around, and dog shit on the stairs and in the parking lot.

"It was a bathroom with green tiles that came to the height of your chest, and tan-painted walls. The floor, six feet by eight feet, was laid in dull gray tiles. A rack for paper towels on the wall had Towel Saver printed on it. The toilet had a split seat. An overhead light was in the wall."

Ben was on the floor. He just lay there face down, and his legs were shaking. When she bent over to look at him, she saw his head was bleeding. She had had first-aid courses once and they told you to put your hand to a wound and apply pressure, but this was awful heavy bleeding. A wave of blood kept rising out of his hair. She put her hand on it."