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valvula n.(pl. -lae ) = valvule.

valvular

Examination shows that the heart of andrias davidianus have three chamers - two atria and one ventride , the atria on the left of midline , the ventricle on the right of midline , and the atria are divided into two cavities by septum interatriale . there are four valvula semilunaris in conus arteriosus , but no spiral valve in conus arteriosus . the coronary artery is made by arterica carotis externa branches 研究結果表明,中國大鯢循環系統解剖學特點為: 1 .心臟:心房心室為左右排列,兩心房前后排列,共有4對動脈弓,其中第二、三對動脈弓匯合成一條背主動脈;動脈圓錐基部與心室相接處有4個瓣膜,動脈圓錐內沒有螺旋瓣,動脈圓錐與腹側主動脈干之間有3個半月瓣;房間隔有穿孔;冠狀動脈由頸外動脈的分支匯合而成。