Beard W L, Lohse C L, Robertson J T
Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Ohio State University, Columbus 43210.
Vet Surg. 1989 Mar-Apr;18(2):130-4. doi: 10.1111/j.1532-950x.1989.tb01056.x.
The blood supply to the descending colon of the horse was studied by gross dissection and methyl methacrylate corrosion casts. The arterial supply is derived from the left colic artery and cranial rectal artery with the left colic artery supplying approximately the proximal three fourths. Each artery gives off four to eight arcuate arteries that form a series of anastomosing arcades. The arcade pattern continues to form a marginal artery that parallels the long axis of the colon. Small branches from the marginal artery anastomose with adjacent branches to form a secondary arcade. The secondary arcade lies approximately 1 cm proximal to the mesenteric teniae and sends off long arteries at regular intervals that course circumferentially around the bowel. The long arteries begin under the serosal mesothelium and perforate the muscular layers to course in the submucosal layer. The long arteries branch off supplying the wall of the colon and arborize over the antimesenteric surface, anastomosing with the vessels from the opposite side. The result is the formation of a series of vascular rings surrounding the colon. Venous return, in general, parallels the arterial supply.
通过大体解剖和甲基丙烯酸甲酯腐蚀铸型研究了马降结肠的血液供应。动脉供应来自左结肠动脉和直肠前动脉，左结肠动脉供应约近端四分之三的区域。每条动脉发出4至8条弓形动脉，形成一系列吻合弓。弓状模式继续形成一条与结肠长轴平行的边缘动脉。边缘动脉的小分支与相邻分支吻合形成二级弓。二级弓位于肠系膜带近端约1厘米处，并定期发出长动脉，这些长动脉沿肠周呈环状走行。长动脉始于浆膜间皮下方，穿入肌层，在黏膜下层走行。长动脉分支供应结肠壁，并在对系膜缘表面分支成树状，与对侧的血管吻合。结果是形成了一系列围绕结肠的血管环。一般来说，静脉回流与动脉供应平行。
