Skip to content
Khan Academy Blog
Donate

How your heart beats

July 23, 2020October 11, 2012

Medical Fellow Rishi Desai explains “heart depolariztion,” the flow of positive charge through the heart that happens every time your heart beats!

Membrane Potentials – Part 1

Membrane Potentials – Part 2

Permeability and Membrane Potentials

Action Potentials in Pacemaker Cells

Action Potentials in Cardiac Myocytes

Electrical System of the Heart

Depolarization Waves Flowing through the Heart


Free Back-to-School Resources for Families and Homeschoolers

Free Back-to-School Resources for Families and Homeschoolers

August 5, 2026

2026 Khan Academy Updates Every Teacher Should Know 

2026 Khan Academy Updates Every Teacher Should Know 

August 3, 2026

Are ESSER Funds Still Available? What Schools Need to Know Now

Are ESSER Funds Still Available? What Schools Need to Know Now

July 30, 2026

  • News
  • Khanmigo
  • Educators
    • ELA & Humanities
    • Math
    • Science
    • Financial Literacy
  • Districts
  • Khan Academy Kids
  • Families
  • Learners
  • Research
  • Engineering

Search

Strengthen every classroom.

From individual learners to entire school systems, Khan Academy helps learning happen.

Learn more

Visit Khan Academy

© 2026 Khan Academy