Our Amazing Sensory System: Close your eyes for a moment. Even in that brief darkness, your brain is still receiving a stream of information. Your ears pick up sound. Your skin registers temperature. Your inner ear tracks whether you are sitting still or shifting in your seat. The sensory system is working every second, even when you think you are resting.
It is, as Michelle Connolly, founder of LearningMole and former primary school teacher, puts it: “The sensory system is not just about the five senses we learn in Year 1. It is the entire framework through which children understand and interact with the world. When we help children grasp how this system works, we give them insight into their own learning.”
For UK primary teachers and parents, understanding the sensory system opens up better conversations about how children learn, why some children struggle to sit still, and why others cover their ears at loud assemblies. The UK National Curriculum addresses sensory topics directly in Year 1 Science (‘Animals, Including Humans’) and Year 3/4 (‘Animals, Including Humans’ revisited), but the science goes further than the basic five senses most of us were taught.
Research now recognises at least eight distinct sensory systems, with three ‘hidden senses’ playing a foundational role in children’s ability to focus, regulate their behaviour, and engage with classroom learning. LearningMole, a UK educational platform providing curriculum-aligned resources for primary schools, has explored these topics extensively across its teaching materials and video resources.
This guide covers the sensory system in full: how it works, what all eight senses do, how they connect to the UK curriculum, and what teachers and parents can do at home and in the classroom. Whether you are planning a Year 1 lesson on the five senses, supporting a child with sensory processing differences, or simply helping a curious 8-year-old understand why we stop smelling things after a while (that is, sensory adaptation, and it is genuinely fascinating), you will find practical, accurate information here.
The sensory system is the network of organs, receptors, nerves, and brain regions that detects information from the environment and the body, then converts it into signals the brain can understand and act upon. Without it, we would have no awareness of the world around us or of our own bodies.
Think of the brain as a busy post office. Specialised cells called sensory receptors collect ‘letters’ (stimuli) from every part of the body and the outside world. These letters travel along nerve fibres to the spinal cord and then on to the brain, where different departments process different types of mail. The visual cortex handles sight. The auditory cortex processes sound. The somatosensory cortex manages touch and body awareness.
This process is called transduction: the conversion of a physical stimulus (light, sound, pressure, chemicals) into an electrical signal that neurons can carry. Every sensation you experience starts with transduction. A finger touching ice triggers mechanoreceptors and thermoreceptors in the skin. Those receptors fire signals that travel to the brain in milliseconds, producing the experience of cold.
The pathway looks like this: Stimulus (e.g. cold ice cube) → Sensory Receptor (thermoreceptors in skin) → Nerve Fibre → Spinal Cord → Thalamus (the brain’s relay station) → Sensory Cortex (interpretation) → Response (pulling hand away). This loop happens faster than conscious thought. Children who understand this sequence have a real head start in KS2 Science.
Most children learn about the five senses in Year 1. Those five are real and important. But scientists recognise at least eight distinct sensory systems. The additional three, often called the ‘hidden senses,’ are particularly significant for teachers working with children who have SEND or sensory processing differences.
| Sense | Main Organ/Receptor | What it tells the brain |
|---|---|---|
| Sight (Vision) | Eyes / Photoreceptors (rods and cones) | Colour, shape, movement, distance, light levels |
| Hearing (Audition) | Ears / Hair cells in the cochlea | Sound, pitch, volume, direction |
| Smell (Olfaction) | Nose / Olfactory receptor cells | Odours, chemical signals, memory triggers |
| Taste (Gustation) | Tongue / Taste buds (5 types) | Sweet, sour, salty, bitter, umami |
| Touch (Tactile) | Skin / Mechanoreceptors, nociceptors, thermoreceptors | Pressure, texture, pain, temperature |
| Vestibular | Inner ear / Hair cells in semicircular canals | Balance, gravity, head movement, spatial orientation |
| Proprioception | Muscles, tendons, joints / Muscle spindles | Body position, limb location, force and effort |
| Interoception | Internal organs, skin / Visceral receptors | Hunger, thirst, heartbeat, temperature, emotions |
Sight, hearing, smell, taste, and touch are the five senses covered in the Year 1 National Curriculum. Each uses specialised receptor cells that detect specific types of stimulus.
Sight: Light enters the eye through the cornea, passes through the lens, and focuses on the retina. Here, rod cells detect dim light and cone cells detect colour. The optic nerve carries signals to the primary visual cortex at the back of the brain.
Hearing: Sound waves travel into the ear canal and cause the eardrum to vibrate. Three tiny bones (the malleus, incus, and stapes) amplify the vibration and pass it to the fluid-filled cochlea in the inner ear. Hair cells along the cochlea respond to different frequencies, sending signals via the auditory nerve to the brain’s auditory cortex.
Smell: Odour molecules drift into the nasal cavity and attach to olfactory receptor cells on the olfactory epithelium. These cells generate signals that travel directly to the olfactory bulb in the brain. Notably, this is the only sensory pathway with a direct connection to the limbic system (the brain’s emotional centre), which is why certain smells trigger strong memories.
Taste: Taste buds on the tongue’s papillae detect five basic tastes: sweet, sour, salty, bitter, and umami. When food molecules contact taste receptor cells, chemical reactions trigger electrical signals that travel to the brain. Smell and taste work closely together; pinching your nose significantly reduces the richness of flavour.
Touch: The skin contains mechanoreceptors (detecting pressure), thermoreceptors (detecting temperature), and nociceptors (detecting pain). Signals travel through nerve fibres to the spinal cord and then to the somatosensory cortex. Different parts of the body have different densities of receptors; the fingertips and lips have far more than the back or the upper arm.
The vestibular system lives in the inner ear and detects changes in head position, movement, and gravitational pull. Fluid-filled canals and sacs contain hair cells that respond when the fluid moves (when you tilt your head or spin around). Signals travel to the cerebellum, which coordinates balance, and to the brainstem, which helps stabilise vision during movement.
For children, the vestibular system is foundational for sitting upright at a desk, tracking text across a page, and coordinating movement during PE. Children who are ‘vestibular seekers’ may rock, spin, or constantly move; this is often their nervous system trying to get the input it needs. Sensory circuits in schools directly target vestibular regulation.
Proprioception is the sense that tells you where your limbs are without looking. Muscle spindles (embedded in muscles) detect changes in length and tension. These signals travel constantly to the brain and cerebellum, allowing you to do things like touch your nose with your eyes closed or write without staring at your pencil.
Children with poor proprioceptive processing may seem clumsy, hold their pencil too tightly or too loosely, bump into things, or use too much or too little force. ‘Crashing’ or ‘heavy work’ activities (carrying bags, pushing carts, climbing) provide proprioceptive input that helps regulate the nervous system. Many SEND practitioners use proprioceptive activities as part of sensory integration programmes.
A simple classroom demonstration: ask a child to close their eyes and move their arm to a specific position. Ask them to open their eyes and check. Most children are remarkably accurate. This is proprioception at work.
Interoception is the sense of internal bodily sensations: hunger, thirst, heartbeat, bladder fullness, breathing rate, pain, and, crucially, emotional states. Receptors in organs and tissues send signals to the brain’s insula, a region involved in both body awareness and emotional processing.
This is the sensory system that gets the least classroom attention but has enormous implications for learning and wellbeing. Children with poorly developed interoception may not recognise when they need the toilet, struggle to identify when they are hungry or anxious, or find it hard to describe how they feel emotionally. This is particularly relevant for autistic children and those with ADHD, for whom interoceptive awareness can be a genuine challenge.
Teaching interoception can be as simple as regular body check-ins (‘Can you feel your heartbeat? Where do you feel it? Is it fast or slow?’). Schools that incorporate PSHE activities focused on body awareness are, knowingly or unknowingly, supporting interoceptive development.
Sensory adaptation is one of the most useful and underappreciated features of the sensory system. If you have ever stopped smelling your own perfume or noticed that a constantly ticking clock seems to disappear from your awareness, that is sensory adaptation in action. Sensory receptors reduce their firing rate when a stimulus is continuous and unchanged, allowing the brain to focus on new or changing information.
This filtering mechanism is what allows children to concentrate in a busy classroom; the brain learns to treat familiar background noise as unimportant. However, children with sensory processing differences may not adapt as readily, which is why the hum of a fluorescent light or the feel of a jumper label can remain distractingly present. Understanding adaptation helps teachers design more sensory-friendly classrooms.
The senses also work together through multisensory integration. The brain continuously combines information from different senses to build a single, coherent picture of the world. Seeing someone’s mouth move and hearing speech simultaneously allows the brain to understand language more accurately than either sense alone. This is why multisensory teaching (using visual, auditory, and kinaesthetic elements together) tends to produce better learning outcomes than single-channel instruction.
The sensory system appears formally in the UK National Curriculum at two points, though it underpins science learning from Reception onwards.
Year 1 – Animals, Including Humans: Pupils should identify, name, draw and label the basic parts of the human body and say which part of the body is associated with each sense. This is the introduction to the five senses. Lesson activities typically involve matching sense organs to senses and exploring the senses through observation-based activities.
Year 3/4 – Animals, Including Humans: Pupils identify and describe the functions of the parts of the skeleton and muscles, which connect naturally to proprioception. The Year 4 programme adds work on teeth, digestion, and food, with links to taste and smell.
Secondary science builds on this foundation, covering nervous system physiology in more depth. The KS2 foundation that teachers build now directly supports GCSE Biology success later.
Teachers covering the Year 1 senses topic benefit from using observation as the primary learning method. Let children close their eyes and identify sounds, textures, or smells. Ask them to rank how far away they can detect a scent, or whether they can still taste food when holding their nose. These observation-based activities build scientific skills alongside sensory knowledge. LearningMole’s curriculum-aligned science resources for KS1 and KS2 support exactly this kind of active, enquiry-based learning.
These activities require no specialist equipment and work for KS1 and KS2. Each targets a specific sense or sensory system.
The Balance Challenge (Vestibular): Ask children to stand on one leg with their eyes open. Then try with eyes closed. Most children find the eyes-closed version significantly harder. This demonstrates how the brain uses visual information alongside vestibular input to maintain balance.
The Mystery Bag (Tactile/Proprioception): Fill a bag with small objects (a coin, a cotton ball, a marble, a key). Children reach in without looking and try to identify each object by touch. This test tests tactile discrimination and proprioceptive awareness in the fingers.
The Nose Test (Smell and Memory): Blindfold children and have them smell familiar items (lemon, coffee, cinnamon, pencil shavings). Discuss why certain smells trigger memories. This connects to the olfactory bulb’s unique position in the brain’s limbic system.
The Taste and Smell Connection: Provide small pieces of apple and potato of similar texture. Have children hold their noses and try to distinguish between them. Most find it surprisingly difficult. This shows how much of what we call ‘taste’ is actually smell.
The No-Look Nose Touch (Proprioception): Ask children to close their eyes, extend one arm, and then slowly bring their index finger to touch the tip of their nose. Most can do this accurately. This classic neurological test demonstrates proprioception in action. Ask children why they can do this without looking.
The Body Check-In (Interoception): Ask children to sit quietly for 30 seconds. Then ask: Can you feel your heartbeat? Where? Are you hungry? Are you warm or cold? This practice can build interoceptive awareness and can be built into a daily classroom routine.
LearningMole, a UK educational platform providing curriculum-aligned teaching resources for primary schools, offers video resources and teaching materials covering science topics, including the human body and sensory systems. These resources are designed by experienced educators to make complex ideas accessible for children aged 4-11.
For teachers planning Year 1 science lessons, LearningMole’s science video collection includes content on the human body that supports the National Curriculum ‘Animals, Including Humans’ unit. Videos use visual demonstrations and child-friendly explanations to bring sensory science to life in ways that textbooks alone cannot achieve.
For children with SEND or sensory processing differences, LearningMole’s resources on sensory circuits, sensory learning, and supporting diverse learners in the classroom offer practical guidance grounded in educational experience. Michelle Connolly’s background as a former primary school teacher informs the practical, classroom-tested approach across all LearningMole materials.
Explore LearningMole’s science and human body resources for curriculum-aligned videos and teaching materials that support Year 1 and Year 3/4 science topics.
For SEND and sensory support, see LearningMole’s sensory learning resources and sensory circuits guides for practical classroom strategies.
The seven sensory systems most commonly referenced in education and occupational therapy are: sight (vision), hearing (audition), smell (olfaction), taste (gustation), touch (tactile), the vestibular system (balance and movement), and proprioception (body position and movement). These seven are sometimes called the ‘7 senses.’ The UK National Curriculum formally addresses the first five in Year 1 Science, while vestibular and proprioceptive awareness are increasingly included in SEND provision and sensory circuit programmes in primary schools.
The 8th sense refers to interoception: the internal sense that detects signals from within the body, including hunger, thirst, heartbeat, body temperature, bladder fullness, and emotional states. The term is used in occupational therapy and neuroscience, and is increasingly recognised in educational SEND contexts. Children with autism spectrum conditions or ADHD often experience challenges with interoceptive awareness, which can affect their ability to recognise emotions or meet basic physical needs during the school day.
The most effective analogy for primary-aged children is the ‘post office’ or ‘message relay’ comparison. Tell children that their bodies are full of tiny messengers (sensory receptors) that are constantly collecting information and sending it to the brain. The brain is the chief post sorter, deciding what to do with each message. For younger children (Year 1), stick to the five senses and the matching sense organs. For older children (Year 3-6), introduce the idea that the brain receives messages from inside the body too, not just from eyes, ears, and skin. LearningMole’s human body videos take children through these concepts with visual explanations designed for primary school age.
The sensory system exists primarily for survival. It allows living things to detect food, avoid danger, find mates, and navigate their environment. In humans, the sensory system also enables communication, learning, emotional experience, and social connection. Without sensory input, the brain would have no way to build a model of reality. Studies of sensory deprivation show that the brain, deprived of normal input, begins generating its own (which is why prolonged sensory deprivation causes hallucinations). For children, a working sensory system is the foundation of all learning.
A sensory circuit is a short structured activity programme (typically 10-15 minutes) used in schools to help children regulate their sensory systems before learning. The circuit moves through three phases: alerting activities (jumping, bouncing) to wake up the nervous system; organising activities (balancing, crawling) to help the brain integrate sensory information; and calming activities (deep pressure, slow movement) to bring the child into a regulated state ready for learning. LearningMole’s guide to sensory circuits in primary schools covers how to plan and run an effective programme.
Yes. The five traditional senses (sight, hearing, smell, taste, touch) and their associated sense organs are directly covered in the Year 1 ‘Animals, Including Humans’ unit of the National Curriculum for England. The science of how the nervous system carries signals to the brain is built upon in KS3. The vestibular system, proprioception, and interoception are not formally named in the primary curriculum but underpin the curriculum themes of body awareness, health, and PSHE. They are also central to occupational therapy provision and SEND support frameworks used in UK primary schools.
The term ‘hidden senses’ refers to the three sensory systems that are not visible from the outside: vestibular (balance and spatial orientation, detected in the inner ear), proprioception (body position and movement, detected in muscles and joints), and interoception (internal body signals, detected in organs and tissues). These are called ‘hidden’ because they have no obvious external organ, the way eyes, ears, or the nose do. They tend to receive less classroom attention, but they play a significant role in children’s ability to focus, regulate behaviour, and access learning.
Every aspect of classroom learning requires sensory processing. Reading needs both visual processing and proprioceptive control of eye movement. Writing requires tactile feedback from the pencil, proprioceptive awareness of hand position, and vestibular stability to sit upright. Listening in class needs auditory processing and the ability to filter out background noise.
The sensory system is far more than the five senses most of us learned in primary school. It is an integrated network of receptors, nerves, brain regions, and feedback loops that runs continuously, processing millions of signals every second and building the brain’s understanding of the world. For children, this system is still developing. Their nervous systems are being shaped by every sensory experience they have: every texture they touch, every sound they process, every time they balance on a beam or sit cross-legged on a carpet.
For teachers and parents, understanding the full scope of the sensory system shifts the lens through which you see children’s behaviour. The child who cannot sit still may have an under-regulated vestibular system. The child who is distracted by clothing labels may have heightened tactile sensitivity. The child who struggles to identify when they are hungry or upset may have low interoceptive awareness. These are not behaviour problems; they are sensory processing patterns that can be understood and supported.
LearningMole’s curriculum-aligned resources for primary science, SEND support, and sensory learning provide teachers and parents with the materials they need to turn these insights into classroom practice. Michelle Connolly and the LearningMole team have developed over 800 educational videos and 3,300+ free resources grounded in real classroom experience, designed to make concepts like the sensory system genuinely accessible for children aged 4-11 and the adults who support their learning.
LearningMole provides free and subscription-based educational videos and teaching materials aligned with the UK National Curriculum. Whether you are planning a Year 1 senses lesson, looking for KS2 science resources on the human body, or seeking support materials for children with SEND, LearningMole’s library covers primary science, English, maths, and much more.
Browse primary science teaching resources | LearningMole’s sensory and SEND resources | Watch free educational videos on YouTube
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