Respiratory & Circulatory Systems

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Across
  1. 2. the liquid that carries oxygen and nutrients to your cells and picks up waste
  2. 3. a muscle below your lungs that contracts to help you breathe in and relax to help you breathe out
  3. 5. a gas in the air that your body needs to survive
  4. 6. blood vessels that carry blood back to the heart (usually deoxygenated blood)
  5. 8. spongy organs in your chest where oxygen enters your blood and carbon dioxide leaves your body
  6. 10. the windpipe; the tube that carries air from your mouth and nose down to your lungs
Down
  1. 1. a waste gas your body produces that you breathe out
  2. 4. blood vessels that carry blood away from the heart (usually oxygenated blood)
  3. 7. the regular beat you feel when blood is pumped through your arteries
  4. 9. a muscular organ that pumps blood throughout your entire body