sinoatrial

Objective: To study age - related variation of ratio and type of collagen fibers in human sinoatrial node.

目的了解窦房结的胶原纤维年龄变化及分型.

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The sinoatrial node at the junction of the superior vena cava and the right atrium.

窦房结位于上腔静脉与右心房的交界处.

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