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The present author has studied about the vertebral level of the origin of the unpaired visceral branches of the abdominal aorta in 59 korean, 16 females and 43 males, and has drawn the following conclusions. 1) The level of the origin of celiac artery springs form the level of intervertebral disc between the 12th thoracic and ist lumbar vertebra constituter 33.9%, this is the highest frequency. The distance from the celiac trunk to supqerior mesenteric artery is 1.1-1.5cm, which is the most frequent cases of all 2) With respect to the level of the origin of superior mesenteic artery, the highest frequency is observed at the level of the middle one third of the ist lumbar vertebra (23.7%). The distance from the origin of the superior mesenteric artery to the origin of the inferior mesenteric artery is 7.0-7.9cm, which is the most fregnent cases of all. 3) Concerning the level of the origin of inferior mesenteric artery, most cases spring at the level of the lower one third of the 3rd lumbar vertebra (23.7%). The distance from the origin of the inferior mesenteric artery to the bifurcation point of abdominal aorta is 4.0-4.9cm, which is the most frequent cases of all. 4) In regrad to the bifurcation point of abdominal aorta, the higest incidence is found at the level of intervertebral disc between the 4th and 5th lumbar vertebra (42.3%). 5) The distance from the origin of the celiac trunk to the bifurcation point of abdominal aorta is 13.0-13.9cm, which is the most freguent of all.
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