Respiratory and Excretory System

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Across
  1. 4. -Is a serious disease that destroys lung tissue and cause difficulty in breathing
  2. 6. -body that collects waste
  3. 9. -___ are most than likely to have heart attack.
  4. 12. -___ is a drug that speeds up the activity of the nervous system, heart and other organs.
  5. 14. -The fact or condition of being addicted to a thing, activity, or substance.
  6. 15. -The dark sticky substance that forms when tobacco is burned
Down
  1. 1. -What are tiny structures that removes waste from the blood and produce urine.
  2. 2. -Urine flows through two narrow tubes called?
  3. 3. -Is a colorless odor less chemical.
  4. 5. -Oxygen passes through the wall of the ___ and then through the capillary wall into the blood.
  5. 7. -After flowing through the nasal cavities, air enters the ___ or throat
  6. 8. - The air moves into the ___
  7. 10. - The kidney help maintain homeostasis by regulating the amount of ___ in the body.
  8. 11. - what is a chemical that comes from the breakdown of proteins.
  9. 13. -A large dome shaped muscle that plays an important role in breathing