“Your pleura is a thin membrane that lines your chest wall and lungs. It cushions your lungs and makes breathing easier. Infections and chest injuries can damage your pleura and affect your ability to breathe. You can help protect your pleura by wearing padding while playing sports and wearing a seatbelt every time you’re in a car.

A hollow area (pleural space) lies between the layers of your pleura. Your pleural space contains a thin layer of pleural fluid. Pleural fluid helps your pleura move as you breathe.

The pleura has two layers:

• Visceral pleura. This is the inner layer of your pleura. It covers your lungs, blood vessels, bronchi and nerves. The visceral pleura doesn’t have sensory nerves, so they aren’t sensitive to pain.
• Parietal pleura. This is the other layer of your pleura. It attaches to your chest wall. The parietal pleura is sensitive to pain.

The function of your pleura is to help cushion your lungs and prevent them from rubbing against your chest wall.  The function of your pleura is to help cushion your lungs and prevent them from rubbing against your chest wall.”

Cleveland Clinic (Pleura: Location, Anatomy, Function, Diseases & Conditions)