单词coronary sulcus
un.: 冠状沟网络: 房室沟；心脏一周的
冠状沟
The most prominent groove is the coronary sulcus that encircles the heart and marks the division between the atria and ventricles.
最突出的凹线是包围心脏并且指示在心房和心室之间的分裂的冠状沟。