![]() Sensory systems, or senses, are often divided into external (exteroception) and internal ( interoception) sensory systems. Via cranial and spinal nerves (nerves of the Central and Peripheral nervous systems that relay sensory information to and from the brain and body), the different types of sensory receptor cells (such as mechanoreceptors, photoreceptors, chemoreceptors, thermoreceptors) in sensory organs transduct sensory information from these organs towards the central nervous system, finally arriving at the sensory cortices in the brain, where sensory signals are processed and interpreted (perceived). In organisms, a sensory organ consists of a group of interrelated sensory cells that respond to a specific type of physical stimulus. Sensation and perception are fundamental to nearly every aspect of an organism's cognition, behavior and thought. ![]() During sensation, sense organs collect various stimuli (such as a sound or smell) for transduction, meaning transformation into a form that can be understood by the brain. Senses used by non-human organisms are even greater in variety and number. Although in some cultures five human senses were traditionally identified as such (namely sight, smell, touch, taste, and hearing), it is now recognized that there are many more. Sensation consists of signal collection and transduction.Ī sense is a biological system used by an organism for sensation, the process of gathering information about the world through the detection of stimuli. ![]() For other uses, see Five senses (disambiguation). ![]()
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