We people walk and run on this earth in our daily life. Besides us, many other creations roam the earth, ranging in size from so small that they are impossible to see with the naked eye to so large that they can be seen from a far.
While walking on the ground, we often do not pay attention to small insects and they come under our feet and die. Later when we watch, we are very sad because no one wants to do that. How can we hurt someone like that?
We think how much pain they must have felt when they came under our feet, but it is not so. Insects cannot feel pain or in other words they do not feel pain.
Let us tell you why this happens. Whenever something hurts, we feel the pain and without seeing it, we get an idea of the place where the pain is happening. Actually it's not. We have sensory neurons all over our body that sense touch or if something touches us.
They then send signals to the brain and provide information about that object. For example, if our hand touches a hot object while working, we immediately withdraw our hand. The feeling of heat is caused by these sensory neurons.
But research has shown that insects do not have pain-sensing sensory cells. Thus they cannot feel pain. But if a part of their body is broken by being stepped on, they feel confused, which causes them to react as if they are in pain.
There are four stages of feeling pain that are:
1) Transduction
2) Transmission
3) Modulation
4) Perception.
After all these processes are completed, the brain shows its response. These processes include from receiving the stimulus to the transmission of that stimulus to the brain through the nerves.
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