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Lecture outline, Biology 152, 2 April 2010 Animal Form and Function This lecture starts a rather brisk march through animal form and function, basically covering one aspect or organ system each lecture . There will be quite a bit of memorization, but the emphasis will be on understanding how the systems function as a whole, that is how the component parts interact with one another and the environment. Animals (and plants for the most part) are mostly confronted with the same sets of challenges, such as obtaining oxygen, eliminating waste, obtaining food, coordinating motion, and reproducing. However, animals have responded to the natural selection caused by these challenges in different ways. One of the most fundamental influences on organisms is a simple result of geometry.
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Unformatted text preview: The ration of surface area to volume (SA:V) decreases with increasing size. See for yourself . Take a cube that is 1 inch on a side, what is the SA:V for this cube? Increase the cube to 2 inches on a side .what is the SA:V now? Finally consider a cube that is 4 inches on a side This relationship has implications for gas exchange, mobility, waste elimination, thermoregulation, and more. The myriad organ systems of most multi-cellular organisms are in part a response to this phenomenon. Another issue that has far reaching consequences in animal form and function is energetics. Different species have evolved very different strategies for accommodating their energetic needs. This is, in part, influenced by the SA:V relationship mentioned above...
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This note was uploaded on 04/06/2010 for the course BIOL 152 taught by Professor Niedenthal during the Spring '09 term at Kansas.

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