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T-6 spinal ganglion, apex of urogenital sinus, cloacal membrane, dorsal aorta, gonadal ridge, intercostal nerve (T-7), junction of tubule with mesonephric duct, labioscrotal swelling, lateral coelomic bay, leg mesoderm, medial coelomic bay, mesonephric duct, mesonephric ridge, midgut, midgut mesoderm, notochord, peritoneal cavity, primitive foot plate, primitive meninx, rib primordium, superior mesenteric artery, tail bud, tail somite, umbilical vein, urogenital fold, urogenital groove

A section through the labioscrotal swelling and the urogenital groove and fold.

Observe:
1. The coelomic bays of the peritoneal cavity medial and lateral to the mesonephric ridge.
2. The junction of a tubule with the mesonephric duct.
3. The apex of the urogenital sinus that is continuous with the allantois in Section 29.
4. The platelike cloacal membrane in the depths of the urogenital groove.
5. The junction of the tail bud with the body.


Keywords: T-6 spinal ganglion, apex of urogenital sinus, cloacal membrane, dorsal aorta, gonadal ridge, intercostal nerve (T-7), junction of tubule with mesonephric duct, labioscrotal swelling, lateral coelomic bay, leg mesoderm, medial coelomic bay, mesonephric duct, mesonephric ridge, midgut, midgut mesoderm, notochord, peritoneal cavity, primitive foot plate, primitive meninx, rib primordium, superior mesenteric artery, tail bud, tail somite, umbilical vein, urogenital fold, urogenital groove

Source: Atlas of Human Embryos.