HTHSCI 1CC6 Lecture Notes - Lecture 5: Bronchopulmonary Segment, Simple Squamous Epithelium, Thoracic Cavity
25 Oct 2018
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Lomoar cpsd| 2151316 (note: this was done by a stray not a group member: review function and lung anatomy: focus on pleura, lobes, major airways. Each lung is enclosed and protected by a double-layered serous membrane called the pleural membrane (ploor- al; pleur- _ side). The superficial layer, called the parietal pleura, lines the wall of the thoracic cavity; the deep layer, the visceral pleura, covers the lungs themselves (figure 23. 8). Between the visceral and parietal pleurae is a small space, the pleural cavity, which contains a small amount of lubricating fluid secreted by the membranes. This pleural fluid reduces friction between the membranes, allowing them to slide easily over one another during breathing. Pleural fluid also causes the two membranes to adhere to one another just as a film of water causes two glass microscope slides to stick together, a phenomenon called surface tension. Separate pleural cavities surround the left and right lungs.
