title: The staged sequential development of the anus and rectum in human embryos and fetuses.
mesh_terms: D001003:Anal Canal / Q000196:embryology*; D002455:Cell Division; D002988:Cloaca / Q000196:embryology; D004475:Ectoderm; D005333:Fetus; D005865:Gestational Age; D006801:Humans; D012007:Rectum / Q000196:embryology*; D013997:Time Factors; D014566:Urogenital System / Q000196:embryology