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Which parts of the body have especially high concentrations of skin thermoreceptors?
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Thermoreception
Warm-blooded animals, such as polar bears, maintain stable body temperatures and adapt to substantial geographic and seasonal temperature fluctuations. Thermal adaptation is supported by the function of sensory structures called thermoreceptors.
In mammals, skin thermoreceptors are not distributed uniformly across the body. Instead, they are concentrated in specific areas where sensitivity to temperature is heightened.
These thermoreceptors are found in especially high concentrations in the following regions:
- Orofacial regions: This includes the areas around the mouth, lips, tongue, nose, eyes, and ears.1
- Extremities: High concentrations are also located on the hands and feet (or paws in quadrupeds).1
While these areas have a high density of thermoreceptors, it is important to note that cold receptors are generally more numerous than warm receptors throughout the skin. Furthermore, while skin thermoreceptors are responsible for detecting external temperature changes, warm receptors are also found in deep tissues, such as muscle and viscera.1