泄殖腔膜（cloacal membrane）是一个在泌尿生殖器官发育期间，覆盖胚胎泄殖腔的薄膜[1]。
它由外胚层发展，并与内胚层彼此接触[2] 。随着人类胚胎和尾折持续生长，直肠间隔将泄殖腔分为腹侧泌尿生殖窦和背肛管。在直肠隔膜有机会与泄殖腔膜融合之前，泄殖腔膜会破裂，将泌尿生殖窦和背肛管再次暴露于外部。之后外胚层塞、肛门膜形成直肠的下三分之一。
参考文献
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