No matter how cold the weather is, the part is not cold or frozen

It's cold, but why is there a part that I see they never get cold? Why?

The northeast monsoon winds flooded, making many people huddled in cold weather. Despite curling up in the "warm wind towel", warming hands with gloves . many still feel cold.

But do you know that there is an extremely super-human body on our bodies - no matter how cold it is, it doesn't get cold or even down?

And the answer is the eyes. Why so?

Is it because it is so cold that the eyes no longer feel cold? But no, actually, the reason is because our eyes only have nerves in charge of touch and feeling, without the sensation of cold sensation.

Therefore, no matter how cold the weather is, our eyes don't feel cold.

It is known that this characteristic formed from ancient times, helping us adapt to the environment in the long-term evolution of humanity.

Because the eyes are an important organ, it is used to observe the world around anytime and anywhere so if the eyes are cold, freezing every winter, it will be very difficult.

Experts have revealed that there are many reasons why it is difficult for the eyes to freeze before the cold.

That's because the liquid that moistens the other eye is not pure water but salt water. Salt water will have a lower freezing temperature than pure water. Plus the body's system for regulating body temperature is very strong, so they regulate body temperature so that the eyes can still see things.

The number of capillaries in the eye is quite large, so in areas with low heat, blood flow increases rapidly, rushing to capillaries to help heat the eyes, not letting the eyes become cold.

And yet, eyeballs are very well protected against adverse impacts outside the environment, located deep inside, covered by eyelids .

With this protection, the eyes will be hard to be cold but still able to open up to see the world.