界嵴(cristaterminalis,CT)位于右房侧壁，是自上腔静脉口前方至下腔静脉口前方的肌性隆起，与下腔静脉口前方的欧氏嵴(eustachianvalve,EV)相延续。
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.
目的观察和测量人右心房界嵴和梳状肌的形态和组织结构，以探讨其可能的功能。
Objective To study the morphologic features of terminal crest and pectinate muscles in human right atrium and discuss their possible function.
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