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.

10922_Permeability_and_membrane_potentials.html

10929_Thinking_about_heartbeats.html

10928_A_race_to_keep_pace_.html

10920_Membrane_potentials_part_1.html

10930_New_perspective_on_the_heart.html

10927_Depolarization_waves_flowing_through_the_heart.html

10925_Resetting_cardiac_concentration_gradients.html

10924_Action_potentials_in_cardiac_myocytes.html

10921_Membrane_potentials_part_2.html

10926_Electrical_system_of_the_heart.html

10923_Action_potentials_in_pacemaker_cells.html