cardiac conduction system

Question 1

cardiac conduction system

Answer 1

group of specialised cells that send electrical impulses to cardiac muscle causing it to contract

Question 2

SA node

Answer 2

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

Question 3

AV node

Answer 3

delays transmisstion of cardiac impulse by 0.1 seconds allowing atria to fully contract
ventricular systole begins

Question 4

bundle of his

Answer 4

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