1. I warm and clean the air you breathe nsoe 2.there are 300 millions of me in your lungs rai cas3. I leave your body when you breathe out craobin doidixe 4. Iam a long tube connecting tour mouth to your lungs tarehca 5. I go through the air sacs and into the blood oyxegn

Practice or pre-exercise theories of play pose the idea that a. play provides children with an opportunity to practice adult activities. b. play is necessary to reenergize human cognition. c. children have too much energy and play will rid them of that energy. d. children are the link between animals and human beings.