[Music] today we're going to learn five cool facts about the nervous system fact number one the nervous system is made up of your brain spinal cord sensory organs and nerves the nerve sends signals to the brain traveling up the spinal cord they can send messages faster than we can think so sometimes our body reacts before we know why a great example of this is removing your hand from a hot surface before we feel the burn this is because the nerves felt it and very quickly told the brain that we needed to move fact number two neurons are cells which transport and store information and they are the cells which make up the brain there are around 100 billion neurons in your brain always taking in new information and reacting to the world around us there are only around 100 000 million stars in the milky way which is the galaxy we live in that's a lot of stars but there's even more neurons fact number three when we live in the world our experiences are shaped by our five senses the five senses are sight we see using our eyes our eyes connect to the ocular nerve which sends messages to your brain telling it what you see hearing we hear using our ears our ears send signals to the brain through the cochlear nerve that tells the brain what you hear smell we smell using our nose the olifactory nerve in our nose sends signals to the brain to tell you what you smell taste when we eat or drink we taste using our tongue the cranial nerves tell the brain what you are tasting touch we touch things with any area of our skin the sensory nerves which lie under the skin tell the brain what you are touching fact number four your nervous system is always working and it controls everything in the body you might have to think about looking smelling tasting and touching things but the nervous system does even more than that your nervous system also controls breathing your heartbeat how the blood flows around your body and digestion of food fact number five your brain and the nervous system even work while you're asleep to keep your body running until you wake up sleep is very important for your brain's health the brain uses the time you are sleeping to process the events of the day this means the brain can sort your memories into long-term memories and you can process all the emotions and experiences you had that day then when you wake up your brain is restored and ready to experience a new day i hope you liked my five cool nervous system facts see you soon [Music] you