Question

A fluid filled double membranous layer surrounds the lungs. Name it and mention its important function.

Answer 1

Pleural membrane :

Each lung is covered by two membranes known as pleura. In between these two membranes is present a cavity known as the pleural cavity which is filled with pleural fluid.


Function of pleura :

The pleural fluid lubricates the pleural membranes so that they can slide over each other without any friction during breathing.