Objective: To study age - related variation of ratio and type of collagen fibers in human sinoatrial node.
目的了解竇房結的膠原纖維年齡變化及分型.
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The sinoatrial node at the junction of the superior vena cava and the right atrium.
竇房結位于上腔靜脈與右心房的交界處.
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