lecture 3-29 respiration II

lecture 3-29 respiration II - Chapter 42 continued Learning...

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Chapter 42 – continued Learning objectives • Explain how breathing is controlled in humans • Explain how the respiratory systems of birds and mammals differ • Define partial pressure and explain how it influences diffusion across respiratory surfaces • Describe the adaptive advantage of respiratory pigments in circulatory systems. • Distinguish between hemocyanin and hemoglobin as respiratory pigments • Draw the Hb-oxygen dissociation curve, explain the significance of its shape, and explain how the affinity of hemoglobin for oxygen changes with oxygen concentration. • Describe how carbon dioxide is picked up at the tissues and deposited in the lungs.
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How a Bird Breathes Besides lungs, bird have eight or nine air sacs That function as bellows that keep air flowing through the lungs Avian lungs do not have alveoli , as mammalian lungs do, but instead contain millions of tiny one-way passages known as parabronchi. Air flows through the honeycombed walls of the parabronchi
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This note was uploaded on 03/19/2008 for the course BIO 311D taught by Professor Reichler during the Spring '08 term at University of Texas at Austin.

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lecture 3-29 respiration II - Chapter 42 continued Learning...

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