【摘要】 研究了江豚的心脏，主动脉弓和头颈部的动脉，并与多种齿鲸相比较。与陆生哺乳类相比：江豚的心尖偏右，江豚左、右头臂动脉干的直径差别很大，右胸后动脉由右头臂动脉干发出；无椎动脉，颈内动脉退化，颈外动脉明显粗大；无明显的颈动脉窦结构；左、右舌动脉分支为３支和２支更多还原

【Abstract】 In this paper, the heart, aortic arch,artery of the head and neck of the finless porpoise were be studied.These arteries were compared with that of some toothed whales.The heart of the porpoise faces toword the right.The right arteria anonyma which branch out the right posterior thoracica artery is much different from the left arteria anonyma in diameter.There is no arteria vertebralis and the internal carotid artery is degenerate. The external carotid artery is more thick and the structure of the carotid sinus is not clear. the left and right arteria lingualis divide into three and two branchs respectively.更多还原