The sensory nervous system is the division of the peripheral nervous system responsible for detecting stimuli from the internal and external environments. This system is comprised of specialized sensory receptors, which transduce physical energy—such as light, sound, pressure, temperature, and chemical gradients—into electrical signals. These raw signals are transmitted via sensory nerves toward the central nervous system for processing. Sensory input is categorized based on the type of stimulus detected (e.g., mechanoreception, photoreception, nociception) and the pathway followed, allowing the organism to build a continuous map of its surroundings. The integration of these inputs facilitates awareness and informs motor responses, enabling interaction with and maintenance of homeostasis within the body.