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.
- Which blood vessel carries blood and where?
- What is blood?
- How minerals salts are taken up?
- Where are red blood cells made?
- What are capillaries?
- What makes heart sound like lub?