The evolution of pain

Hard wired into the survival mechanisms of all animals is the perception of pain. Different stimuli, such as heat or cold, foul odors, chemicals or a blunt blow can trigger pain receptors in the body that, in the blink of an eye, jolt the body into classic fight or flight responses.Researcher Shigeru Saito, et. al.
Pain / Anesthetics News From Medical News Today

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