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...
 
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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 contain red...
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    like sulphur...

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