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Ch. 42 - Gas Exchange and Circulation

Chapter 41, Problem 4

Describe the disadvantages of an open circulatory system relative to a closed circulatory system.

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Hello, everyone here. We have a question asking why are open circulatory system advantages to some animals? A. They help the animals fly? An open circulatory system would not help animals fly so A. Is incorrect Be they do not need blood vessels. Both open and closed circulatory symptoms have blood vessels, so B. Is incorrect. See they do not need a heart to function. Both open and closed circulatory systems have a heart is the most important components of the blood circulatory system, so C. Is incorrect. So our answer is D. They require less energy for distribution. Thank you for watching. Bye.
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Explain how each parameter in Fick's law of diffusion is reflected in the structure of the mammalian lung.

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Frog lungs have a smaller surface area for gas exchange than mammalian lungs. How do frogs compensate for this difference? a. Frog tissue absorbs more oxygen from the blood than mammalian tissue does. b. Frogs breathe more quickly than mammals. c. Frogs also obtain oxygen via diffusion across the skin. d. Frog lung tissue has a greater density of capillary beds than mammalian lung tissue.

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Carp are fishes that thrive in stagnant-water habitats with low oxygen partial pressure. Compared with the hemoglobin of many other fish species, carp hemoglobin has an extremely high affinity for O2. Draw an oxygen–hemoglobin equilibrium curve showing separate lines for carp and a fish that lives in water with a higher oxygen partial pressure. Explain why they differ.

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