Answer:
SA Node
Inter-nodal Pathways
AV Node
AV Bundle
Bundle Branches
Purkinje Fibers
The SA nodes functions first for setting pace for the heart, then the inter-nodal pathway make link b/w SA and AV node. AV node is site of delay when contraction of atria occurs. AV bundle is the mean of electrical link b/w atria and ventricle. The conveying of impulse to the inter-ventricular septum occurs through bundle branches, while conveying of impulse throughout and along the walls of ventricle occurs through Purkinje fibers. 
 
        
             
        
        
        
People with O+ blood cannot donate their blood to negative blood types, while people with O- blood can donate to any blood type. This makes them the "universal donor." However, they can only receive O- blood.
        
                    
             
        
        
        
<span>In this scenario it will be listening like about the process it took to firstly diagonise cancer in the form of medical tests done and then the list of medical treatments that he should undergo in the future inorder to overcome cancer and finally it’s the about building positiveness and confidence to overcome cancer as soon as possible.</span>
        
             
        
        
        
<span>The reaction required an input of energy.</span>