Topic: Food Energy and Respiration Subtopic: Diseases of the respiratory system
Why is cold caused?
Answer: Cold is caused by neither bacteria nor fungi, it is caused by a special virus which enters the nose and throat breaking down the cells that line up these passages.
Learn also:
- What is pollination?
- What is bronchus?
- How flu virus enters?
- What happens if excess juice is secreted in stomach?
- What is transpiration?
- What happens to chest when we inhale?