TECHNOLOGY
Rockett, Paul

100 Trillion Good Bacteria Living in the Human Body

(4) 4-6 Big Countdown series. Facts about the human body and its many parts are presented in terms of numbers, such as the amount of cells, hairs, bacteria, and bones; the time it takes to digest food or grow a baby; and the sizes of all the various organs. All these facts are crammed onto colorful but busy layouts, along with illustrations and a few photographs. Reading list, websites. Glos., ind.

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