A penguin's feet are nearly as cold as ice,while the bird's core body temperature is much higher.Which of the following explains this observation?

Question

Quizplus · Accepted Answer

Countercurrent heat exchange allows for the transfer of heat from warm blood to cold blood in order to conserve body heat. In penguins, warm arterial blood flows towards the feet and is cooled by cold venous blood flowing back towards the body, thereby minimizing heat loss through the feet. This results in the penguin's feet being nearly as cold as ice, while the core body temperature remains much higher.

A Penguin's Feet Are Nearly as Cold as Ice,while the Bird's