Describe the electrical conductance system of the heart?

An excitation signal (an action potential) is created by the sinoatrial (SA) node.The wave of excitation spreads across the atria,causing them to contract.Upon reaching the atrioventricular (AV) node, the signal is delayed.It is then conducted into the bundle of His, down the interventricular septum.The bundle of His and the Purkinje fibres spread the wave impulses along the ventricles, causing them to contract.



JS
Answered by Jason S. Science tutor

1708 Views

See similar Science GCSE tutors

Related Science GCSE answers

All answers ▸

HIV is diagnosed by blood tests. State two safety precautions that need to be taken when handling blood samples.


Explain how red blood cells are adapted to carry out their function?


Which chamber of the human heart pumps blood towards the lungs?


The mass of a balloon is 0.02g before it is filled with air. After it is blown up with air the mass is 0.04g. Assuming oxygen makes up 21% of air, calculate the number of moles of oxygen in the balloon.


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences