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13 Cards in this Set
- Front
- Back
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Pulmonary arteries
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large diameters and relatively thin walls; much more distensible (higher compliance) than systemic arteries
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Pulmonary arterial system can accomodate about....
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2/3 of the stroke volume of the right ventricle with a relatively small increase in pressure
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Pulmonary arteries direct...
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deoxygenated blood to the pulmonary capillaries
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Pulmonary capillaries
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Form a dense network ("sheet" of blood) within the alveolar walls, average diameter is 10 microns
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The endothelium of the pulmonary capillaries is?
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relatively permeable to albumin; pulmonary interstitium is therefore relatively rich in albumin
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What is the consequence of having a pulmonary interstitium that is rich in albumin?
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interstial edema which leads to fluid in the alveoli
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4 Pulmonary veins
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Deliver oxygenated blood to the left side of the heart
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In bronchial circulation, bronchial arteries direct...
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oxygenated blood (1%-2% of CO) to lung tissue - connective tissue, large and small bronchi
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In bronchial circulation, venous blood drains into...
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the pulmonary veins and is delivered to the left atrium
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What is the consequence of the venous blood draining into the pulmonary veins and being delivered to the left atrium?
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shunt blood, deoxygenated blood is mixing with oxygenated blood, decreasing PO2
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Where do lymphatic capillaries originate?
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in the interstitial spaces surrounding the terminal bronchioles
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Large lymphatic vessels travel?
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upward next to the airways and empty into the thoracic duct
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What do the pulmonary lymphatics function to do?
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remove particulate matter that crosses the alveoli into the interstitium, as well as albumin present in the interstitium
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