Hierarchia anatomiczna

Anatomia ogólna > Układ pokarmowy > Jelito cienkie > Dwunastnica > Część wstępująca

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Opis

The ascending portion (pars ascendens; fourth portion) of the duodenum is about 2.5 cm long.

It ascends on the left side of the aorta, as far as the level of the upper border of the second lumbar vertebra, where it turns abruptly forward to become the jejunum, forming the duodenojejunal flexure.

It lies in front of the left Psoas major and left renal vessels, and is covered in front, and partly at the sides, by peritoneum continuous with the left portion of the mesentery.


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