________ shuts the atrioventricular valve and opens the semilunar valves, forcing blood into the aorta.
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AVN
________ is connected to bundle of His- specially modified muscle fibres, and then impulse is passed to finer branching network of purkyne tissue to the base of the ventricles.
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Purkyne tissue carries
________ impulses five times faster than surrounding muscle to ensure that the base of the ventricle contracts first in ventricle systole, forcing blood in the right direction.
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atria
Boundary between ________ and ventricles is made of connective tissue which does not conduct these impulses.
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Refractory period
________= period of insensitivity to stimulation- longer in the heart than in most muscles, allows heart muscles to relax to allow refilling and prevents the muscle suffering from fatigue.
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nervous system
Myogenic= originates within the muscle rather than the ________, and results in depolarisation.
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AVN is connected to bundle of His
specially modified muscle fibres, and then impulse is passed to finer branching network of purkyne tissue to the base of the ventricles
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refractory period = period of insensitivity to stimulation
longer in the heart than in most muscles, allows heart muscles to relax to allow refilling and prevents the muscle suffering from fatigue
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