Science Form 3 Chapter 1-Respiration

9 cards

short note of science


 
  
Created Mar 6, 2010
by
nier212

 

 
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1
1.Respiratory syst. made up of...
 
-
2
and...
 
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3
2.Breathing mechanism
 

Inhalation:-thoraric cavity-bigger

                 ...

4
3.Transport of oxygen
 

-oxygen dissolve in alveolus,then diffuse into

blood capillaries

-the blood...

5

4.Effects of harmful substances:

a)Cigarette smoke

 

contain:tar-cause lung cancer

             ...

6
b)car exhaust
 
contain: carbon monoxide-reduce oxy. in blood
7
c)Industry and vehicles
 

contain:sulphur dioxide-damage lung tissues

             ...

8
5.Diseases that affect respiratory system
 

-bacteria,virus&micoorganisms produce toxins in human body which cause illness

-virus-cause...

9
9.Ways to improve quality of air
 

a)stop smoking

b)use air cleaning system to dissolve toxic gases

  ...

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