Nineteen-year-old Tyler stumbled into the drugstore gasping for breath. Blood was oozing from a small hole in his chest wall. When the paramedics arrived they said that Tyler had been shot and...

Nineteen-year-old Tyler stumbled into the drugstore gasping for breath. Blood was oozing from a small hole in his chest wall. When the paramedics arrived they said that Tyler had been shot and suffered a pneumothorax and atelectasis. What do both of these terms mean, and how do you explain his respiratory distress? How will it be treated?