Sleep : A Necessity Of Life

2250 Words9 Pages
Sleep: a necessity of life I. Everybody needs it: sleep. But what happens to us when we sleep? And what are common sleep-sicknesses? Those are questions that many people think of, sometimes even right before they fall asleep. Humans, like all animals, need sleep, along with food, water and oxygen, to survive. For humans sleep is a vital indicator of overall health and well-being and we spend up to one-third of our lives asleep. There are hundreds, maybe even thousands of things to know about sleep, but the focus will lie on the things that happen to our bodies when we are asleep, common, uncommon and dangerous sleep-sicknesses, and on dreams and nightmares. II. Everyday we fall asleep, usually at the end of the day, sometimes we fall…show more content…
Do you know that feeling of getting an anesthesia. You really realize what happens. First you close your eyes because they get heavy, then you can 't taste anything anymore. After all that happened, you lose the feeling in your toes. They feel a kind of numb, then the feeling climbs up your legs. Now you can feel it in your fingertips and it climbs up your arms. Your tongue has the same strange feeling of getting numb. You can 't feel anything anymore, you just know that you get really calm and you lost all your senses except hearing. When the people around you still talk and you can still hear them, that is in a kind what happens when you fall asleep naturally, except that your body slows down everything at the same time and even the brain waves, so that you don 't realize what happens. And of course you don 't get numb, you just lose the senses. All of those slowing down processes happen in stage two. In stage three and four your body is fully relaxed and you breath in an even slower rhythm. Your blood pressure and body temperature sink. These two stages are very similar and they 're called the “slow wave sleep,” because in these stages you have the slowest of all brain waves. Scientists believe that the most of the regenerative work, such as protein building and hormone release happens during those stages. It takes around 90 minutes to fall asleep and go through all of those stages. After those stages
Get Access