ECO 100 Lecture Notes - Lecture 5: Pleurisy, Pulmonary Artery, Cyanosis
Document Summary
2 main functions of the lungs : oxygenation of blood, removal of waste products (co2) 2 prerequisites needed for lungs to carry out their functions : ventilation movement of air, perfusion movement of blood. 6 main structural components of lungs : airways, acini, alveoli, vasculature, lymphatics, pleura. Airways = trachea, bronchi, bronchioles (terminal and respiratory bronchioles) Units supplied by a single terminal bronchiole. Basic unit of gas exchange includes respiratory bronchioles and its distal alveolar ducts and alveolar sacs. Pulmonary artery carries deoxygenated blood from right side of heart to lungs. Blood becomes oxygenated in the lungs due to gas exchange between alveoli and blood in pulmonary capillaries. Oxygenated blood returns via pulmonary vein to left atrium bronchial (systemic) vessels = Ventilation/perfusion imbalance pleura = visceral and parietal pleura; surrounds lungs air entering the lungs pathway steps = trachea >>> bronchi (left and right) >>> bronchioles (terminal bronchioles) >>> acinus (respiratory bronchioles) >>> alveoli (alveolar ducts >>> alveolar sacs)
