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Atlas of Human Embryos Chapter   Figure

T-7 spinal ganglion, T-8 spinal nerve, dorsal aorta, dorsal mesentery, glomerulus, hindgut, inferior mesenteric artery, intercostal nerve (T-9), left horn of urogenital sinus, left umbilical artery, mesenchymal condensation (mesoderm), mesonephric artery, mesonephric duct, neural canal, postcardinal vein, rectum, rib primordium (T-9), right horn of urogenital sinus, right umbilical artery, splanchnic nerve, sympathetic trunk, tail somite, urogenital mesentery, urorectal septum

A section through the horns of the urogenital sinus near their junction with the mesonephric duct.

Observe:
1. The splanchnic nerve arising from the thoracic part of the sympathetic trunk.
2. The inferior mesenteric artery in the dorsal mesentery coursing to the hindgut.
3. The rectum without a mesentery.


Keywords: T-7 spinal ganglion, T-8 spinal nerve, dorsal aorta, dorsal mesentery, glomerulus, hindgut, inferior mesenteric artery, intercostal nerve (T-9), left horn of urogenital sinus, left umbilical artery, mesenchymal condensation (mesoderm), mesonephric artery, mesonephric duct, neural canal, postcardinal vein, rectum, rib primordium (T-9), right horn of urogenital sinus, right umbilical artery, splanchnic nerve, sympathetic trunk, tail somite, urogenital mesentery, urorectal septum

Source: Atlas of Human Embryos.