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Q.

Why dont Antarctic penguines feet freeze in the winter

Tags: relationships, health, entertainment
Asked by ANURADHA PATHAKJ, 24 Dec '09 05:45 pm
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Answers (8)

1.

Coz they are lined by thick layers of blubber

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Answered by Saj Sierra, 23 Jan '10 12:18 pm

 
  
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2.

To avoid losing too much heat, penguins have adapted to their environment, preserving a central body temperature of 104 degrees Fahrenheit. Their feet present particular problems, since they have a big surface area (as much as one-third of the animals total body length) and cant be insulated by feathers or blubber.

Two mechanisms help address the problems. First, the penguins body can actually control the rate of blood flow to the feet by varying the diameter of vessels supplying the blood. In cold conditions, that flow is reduced; when its warm, the flow increases. Humans do this too: Our hands and feet become white when were cold, pink when were warm.

Second, penguins have countercurrent heat exchangers at the top of their legs. Arteries supplying warm blood to the feet break up into many small vessels, as do the veins, bringing cold blood back from the feet. Because these capillary beds are so close to each other, they modulate the temperature of the blood in both directions ...more
Answered by Pardeep kapoor, 24 Dec '09 05:47 pm

 
  
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3.

To avoid losing too much heat, penguins have adapted to their environment, preserving a central body temperature of 104 degrees Fahrenheit. Their feet present particular problems, since they have a big surface area (as much as one-third of the animals total body length) and cant be insulated by feathers or blubber.
Answered by vijay shukla, 30 Nov '12 01:26 pm

 
  
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4.

Creator of creations knows it
Answered by jameel ahmed, 08 Mar '10 03:55 pm

 
  
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5.

They have in born natural shoes which protect them
Answered by subhash, 01 Feb '10 09:51 pm

 
  
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6.

Because their nature . nature made them like this
Answered by kapil kumar, 28 Dec '09 04:15 pm

 
  
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7.

That is what nature"s creations means
Answered by krish, 24 Dec '09 06:17 pm

 
  
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8.

They are weather proof in Antartica.
Answered by dare devil, 24 Dec '09 05:47 pm

 
  
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