Thermoreceptors are specialized sensory receptors in the body that detect changes in temperature. They are found in the skin, internal organs, and the brain, allowing us to sense both hot and cold environments. These receptors play a crucial role in maintaining the body's temperature balance, signaling when adjustments are needed to keep us comfortable and safe. There are two main types of thermoreceptors: cold receptors, which respond to lower temperatures, and warm receptors, which respond to higher temperatures. When activated, thermoreceptors send signals to the nervous system, helping the body react appropriately, such as sweating when it's hot or shivering when it's cold.