| 释义 |
persistent cloaca
per·sis·tent clo·a·caa condition in which the urorectal fold has failed to divide the cloaca into rectal and urogenital portions. Synonym(s): sinus urogenitalis, urogenital sinus (2) per·sis·tent clo·a·ca (pĕr-sis'tĕnt klō-ā'kă) A condition in which the urorectal septum has failed to divide the cloaca of the embryo into rectal and urogenital portions. |