brain, spinal cord, nerve(s), nervous system, synapse
eye(s), eyesight, sight, seeing, vision, visual perception, optical, image, light, colour
ear(s), hear, hearing, auditory, audition, sound, vibration
tongue, taste, gustation, flavour, sweet, bitter, salt, sweet, umami
nose, smell, olfaction, scent
skin, touch, feel, tactile
