Topic: Food Energy and Respiration Subtopic: Diseases of the respiratory system
How does tar damage lungs?
Answer: Tar sticks on the alveoli walls making them hard and rough. When a smoker coughs, these walls breakdown reducing the surface area for the absorption of oxygen. Moreover, tar is also responsible for lung cancer.
- What is insulin?
- What is blood?
- What is absorbed in large intestine?
- Why blood moves around body?
- What is meant by aerobic?
- What is affect of wind on transpiration?