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 happens if diabetes is not treated?
- How does air enter our lungs?
- What are stomata?
- What is flu?
- What is an artificial pacemaker?
- What is chemical process in digestion?
