1. COMPOSITION OF AIR AND SMOKING

2. GASES FOUND IN AIR
INHALED AIR
EXHALED AIR
OXYGEN
20.93%
16.80%
CARBON DIOXIDE
0.03%
3.50%
NITROGEN
79.04%
79.60%
TEMPERATURE
VARIABLE
WARMER – ABOUT 37°C
WATER VAPOR
SATURATED
DUST PARTICLES
VERY LITTLE

3. The Effects of Cigarette Smoking

9. Smoking can affect humans directly or indirectly!
Directly – Cigarette Smokers
Indirectly – Non smokers who are exposed to second hand smoke!

10. Cigarette Smoke Contains Nicotine an addictive drug
Over 4000 chemicals
Some called “tars”
Toxic and causes cancers of the mouth, lips, throat and lungs
Nicotine an addictive drug
Increases risk of heart disease
Soot trapped in the lungs, causes irritation

11. Cigarette Smoke Contains Carbon Monoxide Inflammation of the lungs
prevents red blood cells from carrying oxygen
Inflammation of the lungs
Reduces gaseous exchange
OXYGEN +HAEMOGLOBIN <->OXYHAEMOGLOBIN
CARBON MONOXIDE +HAEMOGLOBIN <-> CARBOXYHAEMOGLOBIN ( TOXIC)

12. Healthy Lungs

14. Lung cancer is a disease of uncontrolled cell growth in tissues of the lung. This growth may lead to metastasis, invasion of adjacent tissue and infiltration beyond the lungs.
Lung Cancer

15. Dangers of Second Hand Smoke
Second hand smoke (passive smoking)can affect non-smokers
Over 3,000 deaths each year from lung cancer
Irritation of eyes, nose, throat, lungs
Causes coughing, excessive phlegm and chest discomfort.
Pneumonia, bronchitis and other lung diseases especially in children

16. Emphysema is a chronic obstructive pulmonary disease, formerly termed a chronic obstructive lung disease (COLD). It is often caused by exposure to toxic chemicals or long-term exposure to tobacco smoke.
Emphysema

17. Diseases of the Respiratory System caused by smoking
asthma
allergic reaction caused by closing of bronchioles
 bronchitis
inflammation of bronchiole lining
emphysema
alveoli break down causing the lungs to lose elasticity
pneumonia
Alveoli filled with fluid, preventing the exchange of gases
lung cancer
growth of tumours in the lung tissue
Diseases of the Respiratory System caused by smoking