降主动脉

结果发现：在收缩期时，在升、降主动脉是顺向（前进）血流，在横主动脉是逆向血流，在动脉导管是右至左分流。

descending order

descending thin limb of Henle

descending aorta

stool and water descending mixed

descending key【计】

sigmoid-descending colon junction

descending chromatography

descending limb