泄殖腔膜(cloacal membrane)是一個在泌尿生殖器官發育期間,覆蓋胚胎泄殖腔的薄膜[1]。
它由外胚層發展,並與內胚層彼此接觸[2] 。隨着人類胚胎和尾摺持續生長,直腸間隔將泄殖腔分為腹側泌尿生殖竇和背肛管。在直腸隔膜有機會與泄殖腔膜融合之前,泄殖腔膜會破裂,將泌尿生殖竇和背肛管再次暴露於外部。之後外胚層塞、肛門膜形成直腸的下三分之一。
參考文獻
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