Question

The double layered protective membrane of the lungs is ____.

• A. pleural membrane
• B. pericardial membrane
• C. cranial membrane
• D. thoracic membrane

Answer 1

The correct option is A

pleural membrane

The pleural membrane is thin, moist, slippery and has two layers that cover the lungs. Between the two layers is the intrapleural space, which normally contains fluid secreted by the membranes, which helps in the movement of lungs against the chest wall when we breath. It prevents friction between the lungs and walls of the thoracic cavity.