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 situation of blood when it leaves heart?
- What is indigestion?
- What is fertilization?
- What is an artery?
- What happens when blood enters ventricles?
- What are capillaries?