Correct Answer: pleural cavity

Solution : The correct answer is Pleural cavity.

Lungs is the essential body organ which is responsible for breathing exercise and exchange of gases. It is located in chest cavity inside a pleural sac. Alveoli in lungs is the site of exchange of gases. Here the oxygen from air is diffused and taken to the other body parts and the carbon dioxide is taken up from blood and released in the outer atmosphere. The left lung consists of two lobes. While the right lung has three lobes. They are placed inside the rib cage.