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Across 4. The smallest kind of blood vessel 9. One thing blood brings to organs 11. dissolves food in your stomach 12. Take blood away from the heart 13. The pipe your food travels down to reach your stomach 16. the type of digestion your teeth do 17. Part of the digestive system where water is absorbed

Down 1. a mixture of food and gastric juices in your stomach 2. A muscle that pulls your lungs down so they fill with air 3. Tiny little sacs inside our lungs 4. The type of digestion done by our saliva and stomach acid 5. Part of the digestive tract where nutrients are absorbed 6. Exchange oxygen and carbon dioxide with the air and blood 7. Carry blood to your heart 8. Tubes in our lungs branching from our the trachea 10. The pipe your air travels down to reach your lungs 14. The most important organ of the circulatory system 15. The 'lub-dub' sound of our heart valves opening and closing