Sihai network

Why can the human body distinguish between cold and heat? Why do people feel cold and hot?

Our bodies have a variety of feelings, and the response to each feeling is different. It's like we can feel both cold and hot. What's the matter? Let's have a look with Sihai Xiaobian.

Why can the human body distinguish between cold and heat? Why do people feel cold and hot?

A large number of temperature sensing cells are distributed in the skin of human body. Sensory cells can be divided into two categories, one is specialized in feeling cold, so the skin where they exist is called cold spot; the other is specialized in feeling heat, so there are many hot spots on the skin.

When the skin is stimulated by low temperature, the feeling cells in the cold spot will be excited immediately. They transmit the information they receive to the central nervous system through nerve endings, so the human body feels cold. Similarly, after the skin is stimulated by heat, it also feels the heat through this process.