Aiden has been suffering agonizing pain with each breath and has been informed by the physician that he has pleurisy. (a) Specifically, what membranes are involved in this condition? (b) What is their...

Aiden has been suffering agonizing pain with each breath and has been informed by the physician that he has pleurisy. (a) Specifically, what membranes are involved in this condition? (b) What is their usual role in the body? (c) Explain why Aiden’s condition is so painful.

Mr. Rossouw has intense pain in the lower back, which made his doctor order a CT scan. The scan reveals an aneurysm in his right internal iliac artery. Where exactly is this artery located? Which additional imaging technique will the doctor use to identify the artery (and why)?