Pulmonary circulation

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Unformatted text preview: Pulmonary Circulation Hypoxemia Hypoxemia, or reduced oxygen in the blood, can be caused by: 1. 2. 3. 4. 5. Low partial pressure of atmospheric oxygen (e.g., high altitudes) Inadequate pulmonary ventilation (e.g., chronic obstructive pulmonary disease) Carbon monoxide poisoning Reduced hemoglobin content in erythrocytes Decreased hematocrit Tissue Edema and General Principles of Transcapillary Fluid Exchange Edema refers to the swelling of tissues that result from excessive accumulation of fluid within the tissue. Edema can be highly localized as occurs in a small region of the skin subjected to a bee sting. Edema, however, can also comprise an entire limb, specific organs such as the lungs (e.g., pulmonary edema) or the whole body. General principles To understand how edema occurs, it is first necessary to explain the concept of tissue compartments. There are two primary fluid compartments in the body between which fluid is exchanged - the intravascular and extravascular compartments. Th...
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