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Name: Sofia B
Status: student
Age: 17
Location: N/A
Country: N/A
Date: 2002028


Question:
How does being a cold blooded creature effect the heart of the animal...such as does it work harder...is it under more strain...is the structure different...?


Replies:
An organism that is a poikilotherm (cold-blooded) takes on the temperature of its environment instead of using energy to maintain a constant body temp. As the organism becomes colder, its entire metabolism slows down. The heart will beat more slowly when it is cold. When it warms up again, the heart will begin to beat faster. This is one reason why a drowning victim that is pulled from cold water can often be revived, because at a certain point, even our metabolism slows down, the heart beats slower, and less oxygen is used.

vanhoeck


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