![]() ![]() You need to know how it works because it is a part of science and probably it is the most important science. It is really important to know what is happening inside your body. The topic of this book is important because you need to know what is inside you. An average person takes in about 2 kg of food every day, so in your lifetime, you will probably consume over 50,000kg of food which is equivalent to eating 10 elephants. It takes food up to three days to complete its journey all the way through the Digestive System and an adult’s digestive system is 9 meters long. They explain a little bit about food and the Digestive System. A normal human can detect approximately 4,000 different smells and 10,000 different colors. The human brain can make 20 million billion calculations per second. Your brain makes up only 2% of your body’s weight. ![]() They also discuss a lot about your brain and what you detect. The part of the nail you see is dead and the part under your skin is living, this is really strange. Every day hundreds of hairs fall out and needs to start growing again. Hair, fingernails, and toenails are made out of keratin, just like skin. They also write a lot about hair and nails. They always say too much sunlight is bad because too much sunlight can cause skin cancer. About 40 million dead skin cells fall from you each day and Skin makes up to 10% of your whole body’s weight. Skin is the biggest of all your organs and Skin cells are mostly made of a tough protein called keratin. They also talk about the particles and the cells in the skin. Fingernail grow 2mm in a month and toenails grow even slower but both types of nails grow faster in hot weather. Hair grows at an average of 10 mm per month, wow this is really not a lot. They also write about how hair and nails grow. The smallest bone in the body is the stapes or stirrup bone in the ear and it is less than 4mm long. They also talk about the bones that are in your body and how big they are.The biggest, heaviest and longest bone is the femur, in some men, it can grow up to 60cm long. For example, they are 200 different types of human cells and the brain cells are usually not replaced when they die, up to 10,000 of them die each day. I learned a lot of facts from this book and they are all really interesting. It mostly talks about how your body works and what is inside you. The book has different parts like body building block, muscles and bone, skin - hair and nails, the brain and the senses, breathing and circulation, eating and drinking, health and medicine, body changes and finally facts and figures. This book is a science non-fiction book about the Human body. This month I read “The Usborne Complete book Of the Human Body” by Anna Claybourne. ![]()
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