nociceptors

Nociceptors are specialized nerve endings that detect harmful or potentially damaging stimuli such as extreme heat, cold, pressure, or chemicals. When they sense danger, they send signals through the nervous system to the brain, triggering the sensation of pain. These receptors are distributed throughout the skin, muscles, joints, and internal organs, serving as the body's warning system to prevent injury. Their primary role is to alert us to tissue damage or threat, helping us react appropriately to avoid further harm.