2007-03-20 13:49:37 · 4 answers · asked by blahhhaha 3 in Science & Mathematics ➔ Medicine
the SA node (sino-atrial node) fires the atria to contract
the atria...the signal then goes tothe AV node (atrail-ventricular) node, which becomes the Bundle of HIS, which then divides the signal into 2 routes, the right and left bundle branches which then further divides into the purkinge system..
the ventricles have to have more electricity to fire because they are bigger and pump a larger volume of blood (ejection fraction) a greater distance (thru the body)
good luck
2007-03-20 15:34:56 · answer #1 · answered by Anonymous · 1⤊ 0⤋
the atrioventricular (AV) node, which sends impulses down the bundle branches into the purkinje fibers to the ventricular muscle.
2007-03-20 21:11:06 · answer #2 · answered by Troy 6 · 1⤊ 0⤋
Atrioventricular node.
2007-03-20 21:08:10 · answer #3 · answered by Jeye 3 · 1⤊ 0⤋
All of the Above, See the Bundle of His.
2007-03-20 21:24:36 · answer #4 · answered by Anonymous · 1⤊ 0⤋