Khan Academy Static

Your heart relies on the flow of electricity to maintain a steady, consistent beat - like an automatic pump that maintains a regular rate and rhythm throughout your life! There are specialized heart cells that allow positive current to travel quickly throughout the heart muscle. In these videos, we’ll check out the flow of this positive charge on a macroscopic and microscopic level.

15931_A_race_to_keep_pace_.html

15930_Electrical_system_of_the_heart.html

15925_Permeability_and_membrane_potentials.html

15928_Resetting_cardiac_concentration_gradients.html

15933_New_perspective_on_the_heart.html

15929_Depolarization_waves_flowing_through_the_heart.html

15926_Action_potentials_in_pacemaker_cells.html

15927_Action_potentials_in_cardiac_myocytes.html

15924_Membrane_potentials_part_2.html

15923_Membrane_potentials_part_1.html

15932_Thinking_about_heartbeats.html