PLEURA (from Greek pleura - rib, side), a serous membrane lining the part of the common cavity of the body of terrestrial vertebrates, in which the lungs are enclosed (parietal sheet), and passing to the

The pleura-like peritoneum is a serous membrane lined by flattened epithelium (mesothelium). The lining epithelium secretes a watery lubricant—the serous fluid. LAYERS OF THE PLEURA The pleura consist