where electrical impulse starts; natural pacemaker
controls the heart beat
contraction of the atria
electrical wave that shows the contraction of the ventricles
a wave on the cardiac cycle that indicates ventricular relaxation
bundle of His
bundle of fibers that goes along the septum to the apex
bundle of electrical fibers where electrical signals are sent then relayed to the Bundle of His
causes ventricles to contract
picture of the electrical system of the heart
Please allow access to your computer’s microphone to use Voice Recording.
We can’t access your microphone!
Click the icon above to update your browser permissions above and try again
Reload the page to try again!
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Your microphone is muted
For help fixing this issue, see this FAQ.
NEW! Voice Recording
Click the mic to start.