cardiac conduction system Flashcards
1
Q
cardiac conduction system
A
group of specialised cells that send electrical impulses to cardiac muscle causing it to contract
2
Q
SA node
A
pacemaker
myogenic-self regulating
spread electiral impulse across heart (wave of excittation)
spreads through walls of atria, causing them to contract and force blood down to ventricles
3
Q
AV node
A
delays transmisstion of cardiac impulse by 0.1 seconds allowing atria to fully contract
ventricular systole begins
4
Q
bundle of his
A
signal goes down septum into fibres which form bundle of his
tehn branches out into two bundles and then smaller bundles (punkji firbes0 WHICH ALLOW VENYRICALES TO FULLY CONTRACT
