Human Adaptation - Human Adaptation 2009-02-18 Phenotype...

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03:42 Phenotype Physical trait/ behavior (weight) Biological plasticity: our ability to change in response to what we encounter  while growing and living Human Adaptation Both biological and cultural plasticity Temperature adaptation o Humans try to maintain core body temperature (37-37.6 Celsius or 98.6- 99.6 Fahrenheit) Biological adaptations o General body size and proportions Maximize heat dissipation Linear body form (long limbs) Reduce heat production Small body size with reduced insulation Ecogeographical Patterns: Bergman’s Rule At lower temperatures, body size is larger within a species Allen’s Rule Increase in surface area At higher temperature, limbs are longer within a species So, they have a higher surface area/ mass ratio Body Size in Humans Body weight: negatively correlated with mean annual temperature
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Human Adaptation - Human Adaptation 2009-02-18 Phenotype...

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