The more fat that there is on an animal the more heat it will be able to store, because the fat and blubber trap in heat.
The loss of body heat when in the water
the thicker the insulation is then there will be less heat loss. The material also affects heat loss
Yes, it does.
true
In high temperatures there are several methods of body heat loss. One is metabolic heat loss, which is where the metabolism of the body produces heat which is increased in higher temperatures, this in turn produces heat loss. There is heat exchange which is where body heat is lost when making contact with a cooler object. Also conductive heat exchange allows the body to lose heat as coming cool, like water or air, move around the person. The body also uses radiant heat exchange which is where the blood is sent to the superficial arteries and veins to let off heat. Finally there is evaporative heat loss which is of course when a person sweats and as that sweat evaporates it takes body heat with it, thus in turn cooling the body down.
Marine mammals have adaptations such as a thick layer of blubber for insulation, a counter-current heat exchange system to retain body heat, and a low surface area to volume ratio to minimize heat loss. They also have specialized blood circulation that helps in retaining heat in the body.
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the loss of body heat when in the water
Vasodilation actually facilitates heat loss, by bringing blood closer to the surface of the body, where the heat can more readily move from the body to the surrounding environment. The body employs vasoconstriction to retain body heat, for the opposite reason. Thus even though vasoconstriction can cause peripheral coldness and pallor, it's only because the body is conserving its heat in an attempt to prevent the core body temperature from dropping.
the loss of body heat when in the water
the loss of body heat when in the water.