Temperature Regulation in Marine Organisms
There are two extremes of temperature regulation in organisms. Homeotherms are organisms that regulate body temperature to a constant level, usually above that of the ambient (surrounding) environment. A constant and relatively high body temperature enables biochemical reactions to occur in a relatively constant internal environment and at a relatively high rate. Most birds have a body temperature of about 40°C, whereas the temperature of most marine mammals is about 38 °C. Because such temperatures are much higher than that of most seawater, marine homeotherms lose heat rapidly to the surrounding environment.
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