Topic: Food Energy and Respiration Subtopic: Diseases of the respiratory system
How many chemicals are used in tobacco smoke?
Answer: When we smoke tobacco, we are inhaling very harmful chemicals. The number of chemicals present in a cigarette is nearly 300.
- How does air reach blood vessels?
- What is quantity of blood in an adult?
- What is trachea or windpipe?
- What is major content of cigarette?
- What is affect of light on rate of transpiration?
- How is heart transplant done?