2. He wrote the medical dangers of tobacco smoking.

3. It is the substance that makes cigarette addictive.

4. This toxic substance is carcinogenic and accumulates inside the respiratory.

5. It is a poisonous chemical from burnt cigarette that makes the heart do more work to supply sufficient oxygen in the body.

6. This law is providing the establishment of smoke-free environment in public and enclosed places.

7. It is a smoke puffed out by smokers called environmental tobacco.

8. This will remain in the environment even if the smoke is already gone.

9. It is a smoke from lit cigarette that is both inhaled and exhaled.

10. The person who discover tobacco smoking.

11. It is a disease of the heart and blood vessels.

12. The tumor may increase in size but do not invade other body parts.

13. This type of diabetes occurs when the body produces insulin but it cannot be used by the cells.

14. The immune system attacks the heart and can cause fever, weakness, and damage to its valve.

15. It is where deposited fat hardens and becomes plaque on arterial walls.

16. A condition causing the arteries to harden and thicken.

Some types are natural to growing old.

17. Cardiac muscle failure due to lack of blood flow to the heart.

18. It is an invasive malignant tumor from epithelial tissue that tends to spread to other body parts.

19. Arises in cells of the lymphatic or the immune system tissues characterized by abnormal production of white cells and decrease in resistance.

20. It occurs in the air paths and other parts of the lungs. It can be life-threatening and may lead to death if not detected and cured early.