Which of the following have the most efficient lungs: amphibians, mammals or birds? Explain your

answer. What will be an ideal response?


Amphibians have the simplest lung - it is not convoluted and thus has a low surface area. In addition,
air is pushed into their lungs which limits flow. Mammals have far more convoluted lungs to increase
surface area and have the anatomy to draw air into the lung. However, there is still a delay as air
comes in and then goes out. Birds on the other hand have convoluted lungs and a system to draw air
continually over the absorptive surface of the lung.

Biology & Microbiology

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Carbon dioxide dissolves in water to form ____

Fill in the blank with the appropriate word.

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Congestive heart failure occurs when the heart becomes less efficient at pumping blood and blood backs up in the veins and capillaries.

a. true b. false

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An organism's ability to detect stimuli from either the internal or external environment is called

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