从界嵴的中部向下，近心外膜侧，开始出现横行纤维。
The transverse fibers began to appear in the middle and inferior segments of CT near epicardium.
横行的纤维即接索则把成对的两个神经节连在一起。
The transverse fibres or commissure unite the two ganglia of a pair.
横行的纤维即接索则把成对的两个神经节连在一起。
The transverse fibres or commissure unite the two ganglia of a pair.
应用推荐