Subject :ICSO     Class : Class 2 
                                                                        Subject :ICSO     Class : Class 6 
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Subject :ICSO     Class : Class 6 
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Subject :ICSO     Class : Class 5 
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Subject :ICSO     Class : Class 7 
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Subject :ICSO     Class : Class 6 
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Subject :ICSO     Class : Class 6 
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Subject :ICSO     Class : Class 5 
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Subject :ICSO     Class : Class 7 
                                                                        Ans 1:
Class : Class 7 
                                                                                                    
                                                                                                    Pericardium is the answer. A fibrous sac called the pericardium surrounds the heart and major blood arteries.
                                                                                                
                                                                                                 
             
             
        