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Geometry of marine invertebrates : how does the surface area to volume ratio affect the ability of marine invertebrates to obtain oxygen?

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  • Overview: Students in math classes often ask, “When am I ever going to use this?” This integrated math and science unit offers students an opportunity to discover for themselves why geometry in living organisms is both adaptive and essential.
  • Learning Goals: Students will learn the following: • Marine invertebrates are aerobic organisms that take in dissolved oxygen from the surrounding seawater. • Oxygen absorption is easier when the respiratory organ has a high surface area to volume ratio. • The geometry of body and organ shapes may help predict how an animal will fare during low-oxygen environmental conditions.
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  • Oregon Marine Scientist and Educator Alliance website:
  • Oregon Sea Grant website:
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  • The 2019-20 ORSEA materials are based upon work supported by Oregon Sea Grant and the Oregon Coast STEM Hub, as well as the National Science Foundation Regional Class Research Vessels under Cooperative Agreement No. 1333564 Award: OCE-1748726.
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file details ORESU-E-20-002-A.pdf 2021-02-19 Public Download