Learn about the human body by meeting some hilarious characters who are keen to explain why they are the most important!This book makes science learning fun and engaging for children aged 7 plus. Brain is sure that he is the most important part in the human body, after all he is in charge, but what about the heart - she''s always pumping -and blood cells are convinced they are the most hard-working! So which body part really matters most? What Matters Most is a series of humorous books for children that explain science processes with lively comic artwork and show why variety is important. Titles in the series:Body BitsEnergy and Power Gravity and other Forces Materials Plant Parts The Sun, the Moon and the Planets