en:inferior_mesenteric_artery

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en:inferior_mesenteric_artery [2023/04/03 16:54] – brahmantraen:inferior_mesenteric_artery [] () – - () 127.0.0.1
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-====== Inferior mesenteric artery ====== 
  
-In human anatomy, the inferior mesenteric artery, often abbreviated as IMA, is the third main branch of the abdominal aorta and arises at the level of L3, supplying the large intestine from the distal transverse colon to the upper part of the anal canal. The regions supplied by the IMA are the descending colon, the sigmoid colon, and part of the rectum. 
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-===== Structure ===== 
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-Proximally, its territory of distribution overlaps (forms a watershed) with the middle colic artery, and therefore the superior mesenteric artery. The SMA and IMA anastomose via the marginal artery of the colon (artery of Drummond) and via Riolan's arcade (also called the "meandering artery", an arterial connection between the left colic artery and the middle colic artery). The territory of distribution of the IMA is more or less equivalent to the embryonic hindgut. 
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-**Branches** 
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-^ Branch                  ^ notes                                                                                              ^ 
-| left colic artery       | supplies descending colon                                                                          | 
-| sigmoid branches        | the most superior being described as 'the superior sigmoid artery'                                 | 
-| superior rectal artery  | effectively the terminal branch of the IMA (the continuation of the IMA after all other branches)  | 
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-{{:dissection:inferior-mesenteric-artery.jpg}} 
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-|  712   |               |  A. mesenterica inferior                                                                |  Inferior mesenteric artery                                         |    | 
-|  713   |               |  A. ascendens                                                                           |  Ascending artery                                                   |    | 
-|  714   |               |  A. colica sinistra                                                                     |  Left colic artery                                                  |    | 
-|  715   |               |  Aa. sigmoideae                                                                         |  Sigmoid arteries                                                   |    | 
-|  716   |               |  A. rectalis superior                                                                   |  Superior rectal artery                                             |    | 
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