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Figs. 301, 302 and 303. Diagrams showing stages in the development of the bursa omentalis, the greater omentum, and the fusion of the latter with the transverse mesocolon

Diagrams represent sagittal sections (For explanation of lettering in Figs. 302 and 303 see Fig. 301).

From the third month on, the greater omentum becomes larger and gradually extends toward the ventral abdominal wall, over the transverse colon, and then caudally between the body wall and the small intestine (Figs. 301 and 302). The portion between the body wall and intestine encloses merely a flat cavity continuous with the larger cavity dorsal to the stomach.

From the fourth month on, the omentum fuses with certain other structures and becomes less free. The dorsal lamella fuses with the dorsal body wall on the left side and with the transverse mesocolon and transverse colon (Fig. 303).

During the first or second year after birth the two lamellae fuse with each other caudal to the transverse colon to form the greater omentum of adult anatomy.

Links: Coelomic Cavity Development | Gastrointestinal Tract Development

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