1: Counting down the human body1: There are 100 trillion good bacteria living in the human body1: There are 58 billion, nine hundred million skin cells on the human body1: Blondes have one hundred and forty-six thousand strands of hair on their head1: The heart beats one hundred thousand times a day1: Blood travels 96 thousand and five hundred and sixty kilometres a day1: We take 20 thousand breaths a day1: More then six hundred muscles in your body1: 206 bones in the human body 1: 12-72 hours to digest food1: Nine months for a baby to grow in the womb1: Five senses 1: The human brain weighs 1.4 kilograms 1: Large numbers and further information 1: Glossary1: Index

GENERAL KNOWLEDGE & TRIVIA (CHILDREN'S / TEENAGE). You can count numbers all around you, from the eight legs on a spider to the one nose on your face. But can you count the stars in the sky or the fish in the Amazon? Find out all about the THE HUMAN BODY in THE BIG COUNTDOWN, including the millions of bacteria that live in and on us and help our body function healthily, our digestive system, our bones and muscles, our blood and heart, our lungs and breathing, the size of our brain and the number of hairs on our head. It also covers the human life cycle and the development of a foetus in the womb. The Big Countdown looks at popular topics and investigates the great many numbers that make them fascinating. From the mind-bogglingly large to smallest and most precious, this series helps us understand that it's not just our days that are numbered. Ages 9+