BIOL 030 Lecture Notes - Lecture 28: Pulmonary Pleurae, Pleural Cavity, Serous Membrane
16 Sep 2020
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Document Summary
Thin, broad cells that allow for rapid gas diffusion between alveolus and. Round to cuboidal cells that cover the remaining 5% of alveolar surface. Repair the alveolar epithelium when the squamous (type i) cells are damaged. Most numerous of all cells in the lung. Wander the lumens of alveoli and the connective tissue between them. Keep alveoli free from debris by phagocytizing dust particles. Visceral pleura serous membrane that covers lungs. Parietal pleura adheres to mediastinum, inner surface of the rib cage, and superior surface of the diaphragm. Pleural cavity potential space between pleurae. Lower pressure than atmospheric pressure assists lung inflation. Prevents spread of infection from one organ in mediastinum to others. Urinary system consists of six organs: 2 kidneys, 2 ureters, urinary bladder, and urethra. Rib 12 crosses the middle of the left kidney. Secrete erythropoietin, which stimulates the production of red blood cells. Help regulate calcium levels by participating in calcitriol synthesis.
