November 5, 2024

A Level Biology Revision “Initiation and Coordination of the Action of the Heart”

Author: Freesciencelessons via YouTube
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In this video, we look at how the heart beat is initiated and coordinated. We look at the roles of the sinoatrial node, the atria-ventricular node, the Purkyne fibres and the Bundle of His.

Image Credits:
Diagram of heart (modified)
https://commons.wikimedia.org/wiki/File:Heart_valves_NIH.jpg
National Heart Lung and Blood Institute (NIH), Public domain, via Wikimedia Commons

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