[Development of the omental bursa and the organs forming it during human embryogenesis].
The development of the omental bursa and its forming organs has been studied in 53 embryos, 2.8--30 mm parietococcygeal length. As the data obtained demonstrate, isolation of the omental bursa anlage from the right pleuroperitoneal canal of the coelomic cavity results from the appearance of an additional right pulmonary mesentery and a fold of the inferior vena cava. The pulmonary-esophageal part of the anlage is the first to form, and then the gastrohepatic one. The latter gives origin to the omental bursa proper and the antrum. Both parts of the anlage participate in the formation of the superior omental recess. During the human embryogenesis the anterior intestinal derivates undergo spiralization which is realized by two phases--the first, at the level of the inferior third of the stomach and the forming superior horizontal part of the duodenum, and the second--at the level of the superior third of the developing stomach and the esophageal peritoneal part. The spiralization is ensured by a predominant growth of the presumptive greater curvature of the stomach and by the presence of fixative zones in the area of the transversal septa and the future superior horizontal part of the duodenum. Early stages in the stomach development, dynamics of specific interrelations between the organ's margins of the ventral and dorsal mesenterii in embryos at different ages, reflect the phases of spiralization and witness against mechanical furn over of the stomach around the vertical and sagittal axes.
D004386:Duodenum / Q000196:embryology; D006801:Humans; D008099:Liver / Q000196:embryology; D008643:Mesentery / Q000196:embryology; D009852:Omentum / Q000196:embryology*; D013154:Spleen / Q000196:embryology; D013270:Stomach / Q000196:embryology
Razvitie sal'nikovoĭ sumki i formiruiushchikh ee organov v émbriogeneze cheloveka.