亦称Drummond动脉。是由肠系膜上动脉末支、回结肠、右结肠、中结肠和乙状结肠动脉的相邻分支结合成连续的吻合弓，距大肠0.5～0.8cm，从回肠末端伸延到乙状结肠末端。多数为一级吻合弓，但在结肠右曲和盆结肠处形成二级吻合弓。
多数边缘动脉吻合到达乙状结肠直肠动脉（64％）。
In 64% of the specimens, the marginal artery extends to the rectosigmoid arterial zone.
VX2瘤在肝动脉造影动脉期表现由边缘环行染色逐渐向结节状染色过度。
The VX2 hepatomas showed marginal staining with gradual transition to nodular staining on arterial phase of angiography.
结论：豚鼠窦房结动脉多数位于其边缘并受丰富的NOS和NPY能神经支配，对调节窦房结血液供应可能有重要作用。
Conclusions: the nodal artery is dominated by plentiful NOS - and NPY-containing nerve fibers. It may play a role for regulating the blood flow of sino-atrial node in guinea-pig.
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