BIOL 3755 Chapter Notes - Chapter 13: Pulmonary Artery, Respiratory Minute Volume, Functional Residual Capacity
Document Summary
13. 1 organization of respiratory system: alveoli ~ tiny air containing sacs; number approximately 300 million in adult; sites of gas exchange with blood, airways ~ tubes through which air flows from external environment to alveoli and back. Intrapleural fluid ~ thin layer; total volume of which is only few milliliters. Intrapleural pressure (pip) ~ causes lungs and thoracic wall to move in and out together during normal breathing. Boyle"s law: boyle"s law ~ p1v1 = p2v2, at constant temperature, relationship between pressure exerted by fixed number of gas molecules and volume of their container. Increase in volume of container decreases pressure of has: transpulmonary pressure (ptp) ~ difference in pressure between inside and outside of lung, transmural pressure ~ governs static properties of lungs. How is stable balance of transmural pressures achieved between breaths: elastic recoil ~ tendency of elastic structure to oppose stretching or distortion.
