Across
- 3. a change in which new substances are produced
- 4. the little spaces where oxygen diffuses into the blood
- 8. the tube that carries air from the back of the throat to the lungs
- 9. a chemical reaction that happens inside every living cell, in which energy is released from glucose so that the cell can use it
- 10. the organs that help oxygen to get into the body and carbon dioxide to be removed from it
- 12. one of the two tubes that splits off from the trachea and carries and carries air into the lungs
Down
- 1. an addictive drug present in cigarette smoke
- 2. respiration that uses oxygen
- 5. the process where the oxygen passes from the air into the blood, and carbon dioxide passes out of the blood into the air
- 6. tiny particles of soot and other substances, present in cigarette smoke and polluted air, which can damage the lungs
- 7. respiration that without oxygen
- 11. the spreading out of particles, in a gas or dissolved substance, as a result of random movement