system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
TRUE about anal membrane:
assistant
The correct answer is  Anal membrane develops from posterior (not anterior) pa of cloacal membrane, lies at proximal pa of proctodaeum and covers primitive rectum (not urogenital sinus). During development, cloaca ( at distal end of hindgut ) is covered by cloacal membrane which has two pas. Urogenital membrane is the ventral (anterior) pa to cover primitive urogenital sinus. Anal membrane is the dorsal (posterior) pa to cover primitive rectum. Anal membrane perforates at 9th week to let open the gut tube to the exterior at proctodaeum.