Florida State University

Urorectal septum separates cloaca into anorectal canal and the urogenital sinus. Cloacal membrane (proctodeum) breaks down. Upper 2/3 of anal canal from hindgut, lower 1/3 from ectoderm – line of union is the pectinate line. Embryology: Urogenital system. Kidneys. Develop from intermediate mesoderm. ................
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