L30-GasExchange2 - Gas Exchange - II Read Chapter 9, 443...

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Gas Exchange - II Read Chapter 9, 443 -462
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Figure 9.6a–c Orientation of Medium and Blood Flow
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Figure 9.6d–f Orientation of Medium and Blood Flow With unidirectional ventilation, the blood can flow in three ways relative to the flow of the medium
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Design principles for gas exchange system Animals have evolved a great diversity of respiratory systems to maximize their rate of gas exchange. All these systems reflect design principles based on the FickÕs law of diffussion. Q Q = D D A (C1 (C1 ÐC2)/ C2)/ L 2 -- Fi Fi ck ck Õs Õs law aw o o f di di ff ff usion usion Q Ð the rate that a substance diffuses between two locations D Ð diffusion coefficient in a particular medium (air has a greater D value than water) A Ð cross-section area L Ð distance between these locations C1 and C2 are the concentrations of the substance at the two locations
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harynx arynx Esophagus) rachea ight lung ronchus ronchiole iaphragm Heart SEM Left lung Nasal cavity Terminal bronchiole Branch of pulmonary vein (oxygen-rich blood) Branch of pulmonary artery (oxygen-poor blood) Alveoli Colorized SEM 50 µm 50 µm
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Table 9.1 Ventilation of Water vs. Air
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Figure 9.13 Teleost Fishes
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Figure 9.14 Countercurrent Flow in Fish Gills
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This note was uploaded on 05/29/2011 for the course BIO 225 taught by Professor Pavgi during the Spring '08 term at University of Michigan.

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L30-GasExchange2 - Gas Exchange - II Read Chapter 9, 443...

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