File:Human week 10 fetus 26.jpg

From Embryology

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Human Female Fetus - Midgut Herniation (10 week)

Large image version of plane D, close to midline (Stain - Haematoxylin Eosin) 0.5 mm scale bar

Gastrointestinal Development

The gastrointestinal tract has an epithelium and glands formed from endoderm, underlying submucosa and smooth muscle formed from splanchnic mesoderm and an enteric nervous system formed by neural crest.

Loops of the midgut can be seen lying outside the ventral body wall (midgut herniation) but still connected by their mesentery to the posterior body wall. The lefthand portions are cut in longitudinal section, the righthand loops (attached by mesentery) are cut in cross-section. Developing villi can be seen in cross-sections of the midgut. The extensive underlying submucosa is visible and the outer muscularis layer is developing.

Mesentery is seen attached to some of the midgut loops, but in fact forms a continuous connection to the length of the entire midgut, just not visible in this section. Note the may vessels lying within the mesentery.

Hindgut lying within the body peritoneal cavity has a different histological appearance from the mid-gut.

Related Images

Human- fetal week 10 planes icon.jpg

Fetus (week 10) Planes A (most lateral), B (lateral), C (medial) and D (midline) from lateral towards the midline.

Image Source: UNSW Embryology, no reproduction without permission.

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current10:15, 1 May 2016Thumbnail for version as of 10:15, 1 May 20161,200 × 900 (262 KB)Z8600021 (talk | contribs)