control of heart beat

• the heart beat is intiated within the muscle it self

  what is meant by the heart muscle being myogenic
• sino-atrial node


  what is this

  
• apex


  what is this

  
• atrio-venticular node


  what is this

  
• bundle of his


  what is this

  
• Purkinje fibers


  what is this

  
• in the right atrium


  where sisinoatrial node located in the heart
• this acts as a pacemaker and generates an electrical signal to cause contraction

  what is the sinoatrial node
• a thin layer of connective tissue


  when the sinoatrial node produces its electrical stimulation what stops the verticals from contracting at the same time
• it is found between the two atria and will pass the impulse down into the ventricles


  where is it and what is the function of the atrioventricular node
• it is found from the septum to the apex of the heart and is used to transmit the electrical impulse


  where is the bundle of his and whats its function
• purkinje fibres


  what does the bundle of hiss branch into
• this is to spread the impulse to the walls of the ventricals for them to contract


  what is the function of the purkinje fibres
• this is the impulse that spreads over the two atria


  what is meant by a wave of depolarisation