The electrical signal causing contraction of the heart is carried from the atrioventricular bundle to the myocardium of the ventricles by ________ fibers.
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Q84: The two upper chambers of the heart
Q85: The condition that results when arterial endothelium
Q86: During electrical stimulation of the heart, the
Q87: Oxygenated blood can be found in the
Q88: Deoxygenated blood leaving the right side of
Q90: The atrioventricular valves are supported by connective
Q91: When blood pressure falls below normal, the
Q92: _ prevent the backflow of blood in
Q93: The heart muscle itself receives oxygen and
Q94: Spontaneous contractions of the heart muscle begin
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