Question

मध्यकाल तक सभवतः किन-किन बालियों का विकास हो चुका था? ​

Answer 1

The pleurae are two serous membranes; the outer parietal pleura lines the inner wall of the rib cage and the inner visceral pleura directly lines the surface of the lungs. Between the pleurae is a potential space called the pleural cavity containing a thin layer of lubricating pleural fluid.