The human body is one of the most complicated and fascinating living
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The human body is one of the most complicated and fascinating living forms on Earth Here are some interesting features that make it special which you can share with your kids 1 Adult lungs have a surface area of around 70 square metres 2 Your left and right lungs aren t exactly the same The lung on the left side of your body is divided into two lobes while the lung on your right side is divided into three The left lung is also slightly smaller allowing room for your heart 3 Human lungs contain almost 1 500 miles of airways and over 300 million alveoli 4 An average person breathes in around 11 000 litres of air every day Also Read A science teacher explains Why do we fall sick 5 Your nose and ears continue growing throughout your entire life 6 Your sense of smell is around 10 000 times more sensitive than your sense of taste 7 Around 80 per cent of what we think is taste is actually smell Flavour is a combination of taste and smell perception 8 The brain uses over a quarter of the oxygen used by the human body 9 The brain of an adult human weighs around 3 pounds 1 5 kg Although it makes up just 2 per cent of the body s weight it uses around 20 per cent of its energy 10 If you smoothed out all of the wrinkles in your brain it would lay flat the size of a pillowcase 11 Your heart beats around 100 000 times a day 365 00 000 times a year and over a billion times if you live beyond 30 12 Grouping human bl od types can be a difficult process and there are currently around 30 recognised bl od types or bl od groups You might be familiar with the more simplified ABO system which categorises bl od types under O A B and AB 13 When listening to music your heartbeat will sync with the rhythm 14 An healthy adult human heart beats about 75 times on average in a minute 15 In one year a human heart would pump enough bl od to fill an Olympic size pool 16 If all the bl od vessels in the human body were laid end to end they would encircle the Earth four times