Describe how a wave of excitation, which originates in the sinoatrial node (SAN) of the heart, eventually results in ventricular systole.

• SAN send a wave of depolarisation/excitation across the atria causing them to contract• wave cannot pass directly to the ventricle, due to the non-conductive tissue of AV-valves• wave reaches the AVN (in the septum)• passes down bundle of His• up the Purkinje fibres, causing ventricular systole 

Answered by Joseph G. Biology tutor

4391 Views

See similar Biology A Level tutors

Related Biology A Level answers

All answers ▸

What is the difference between type I and type II diabetes?


What is ATP and what makes it a good source of energy in biological processes?


Describe how the lac operon works when lactose is both present and absent.


What is Glycolysis?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences