Science test 1 Crossword
             
             
             
             
             
             
             
             
             
             
             
             
 
 
Down: 1) tube air passes through to get to lungs 2 of them3) flap that closes when you eat keeps food from entering the airway5) muscle that pushes and pulls air into lungs Across: 2) has 4 chambers, muscle that pumps blood4) are branches that lead into each lung6) tiny sacs at the end of the Branchi where oxygen is absorbed into the blood7) breath in8) tiny blood vessels
 

 

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