Erregungsbildungs- und Leitungssystem/en: Unterschied zwischen den Versionen
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There are actually [[Muskelzellen/en|muscle cells]] that have given up the ability of [[Kontraktion/en|contraction]] in favor of [[Kardiale Erregungsleitung/en|conduction of excitation]]. If such a stimulation conducting [[Muskelzellen/en|muscle cell]] fails, the neighbouring cell can immediately take over the stimulation conducting function. | There are actually [[Muskelzellen/en|muscle cells]] that have given up the ability of [[Kontraktion/en|contraction]] in favor of [[Kardiale Erregungsleitung/en|conduction of excitation]]. If such a stimulation conducting [[Muskelzellen/en|muscle cell]] fails, the neighbouring cell can immediately take over the stimulation conducting function. | ||
| − | If only nerve tracts ([[Axon/en|axon]]e) were present for the conduction of the stimulus, the heart would not be [[ | + | If only nerve tracts ([[Axon/en|axon]]e) were present for the conduction of the stimulus, the heart would not be [[Erregungsbildungs-_und_Leitungssystem/en| excitable]] for a long time after its failure, which would result in immediate death. The same applies to the [[Sinusknoten/en|sinus node]], which can be newly formed in the event of a [[ektop/en|ectopic]] failure. |
| − | https://en.wikipedia.org/wiki/Cardiac_excitation-contraction_coupling | + | https://en.wikipedia.org/wiki/Cardiac_excitation-contraction_coupling |
Aktuelle Version vom 13. Januar 2020, 11:08 Uhr
The system that directs the excitation originating from the sinus node on special paths through the heart muscles and thereby achieves a contraction of the working myocardium that is as complete and efficient as possible for the pump function.
There are actually muscle cells that have given up the ability of contraction in favor of conduction of excitation. If such a stimulation conducting muscle cell fails, the neighbouring cell can immediately take over the stimulation conducting function.
If only nerve tracts (axone) were present for the conduction of the stimulus, the heart would not be excitable for a long time after its failure, which would result in immediate death. The same applies to the sinus node, which can be newly formed in the event of a ectopic failure.
https://en.wikipedia.org/wiki/Cardiac_excitation-contraction_coupling