BIOM 3200 Chapter Notes - Chapter 16: Lauren Graham, Intrapleural Pressure, Transpulmonary Pressure
11 Jun 2016
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3 functions: ventilation = a mechanical process called breathing. oxygen concentration of air is higher in the lungs than in the blood and oxygen diffuses down its concentration gradient into the blood. Carbon dioxide however moves from blood to air: gas exchange = occurs between air and blood in the lungs and between the blood and other tissues of the body (external respiration) 3. oxygen utilization = tissues of the body during cell respiration (internal respiration) Type one: 95% of the total surface area of the lung used for gas exchange. Type two: cells that secret pulmonary surfactant and the reabsorb na+ and water, preventing the buildup of fluid in the alveoli. Respiratory zone: site of gas exchange between air and blood (in the alveoli). includes the. Conducting zone: includes anatomical structures where air passes before reaching the respiratory zone (mouth, nose, pharynx, larynx, trachea, primary bronchus, bronchial tree and.
