100 trillion good bacteria living on the human body by Rockett, Paul, author, Ruffle, Mark, illustrator instant download

100 trillion good bacteria living on the human body by Rockett, Paul, author, Ruffle, Mark, illustrator instant download

pages cm, The Big Countdown looks at popular topics and reveals a great many numbers that make them fascinating, 9-11, Key Stage 2, Counting down the human body -- There are 100 trillion good bacteria living on the human body -- There are one trillion, 300 billion skin cells on the human body -- Blondes have one hundred and forty-six thousand strands of hair on their head -- The heart beats one hundred thousand times a day -- Blood travels 96 thousand and five hundred and sixty kilometres a day -- We take 20 thousand breaths a day -- More than six hundred muscles in your body -- 206 bones in the human body -- 12-72 hours to digest food -- Nine months for a baby to grow in the womb -- Five senses -- The human brain weighs 1.4 kilograms -- Further information on large numbers