This title teaches readers about the respiratory system. Readers will learn that the respiratory system and circulatory system are best buds, and about how oxygen moves from the air, to the lungs, into the blood and to cells throughout the body. Aligned to Common Core Standards and correlated to state standards. Abdo Kids Jumbo is an imprint of Abdo Kids, a division of ABDO. Translated by native Spanish speakers--and immersion school educators.