1. anal membrane：泄殖腔膜也被分为背腹两分,腹侧份称尿生殖膜(urogenital membrane),背侧份称肛膜(anal membrane). 肛膜外周为一浅凹,称肛凹或原肛(proectoduem). 肛膜破裂吸收后,消化管尾端与外界相通,肛凹加深,并演变为肛管的下段. 肛管上段的上皮来自内胚层,
2. Anal membrane,Anal plate：肛内褶 Anal invagination | 肛膜 Anal membrane,Anal plate | 肛乳头 Anal papilla
3. Anal plate,Anal membrane：肛乳头 Anal papilla | 肛膜 Anal plate,Anal membrane | 肛突 Anal stylet
1. 肛膜
1. 正常胎鼠在胎龄14.5天-15天时，尾沟、背侧泄殖腔膜处出现大量的细胞凋亡，使肛膜破裂，直肠与外界相通。
In normal rat embryos, on gestational days 14.5 to 15, cellular apoptosis takes place in the tail groove and dorsal cloacal membrane which makes anal membrane rupture, and then rectum exposes to outside.
2. 911查询·英语单词
2. 同时泄殖腔背侧不断向尾沟移动，最后肛膜破裂，直肠末端与尾沟相通，肛门形成。
At the same time cloaca migrates to the tail groove, and anal membrane ruptures leaving terminal rectum connected to the tail groove which gives rise to anus.
3. 所以，本研究提示，细胞凋亡参与了肛膜破裂，直肠与尾沟相通这一过程，与肛门闭锁的发生有关。
Therefore, this current study indicates, cellular apoptosis occurs in anorectal development and closely relates to anal atresia.
4. 细胞凋亡参与了肛膜破裂，直肠与尾沟相通这一过程，与肛门闭锁的发生有关。
Apoptosis participates in rupture of anal membrane, communication of rectum with the tail groove, which determines whether atresia occurs or not.
5. 911查询·英语单词
5. 而畸形鼠在相应的时间和部位没有发生细胞凋亡，无肛膜破裂，直肠亦未与外界相通，导致了肛门闭锁的发生。
While for ARM rats, cellular apoptosis does not take place and anal membrane cannot rupture leaving rectum unconnected to the outside, which leads to anal atresia in the end.
6. 结论鼠胚胎15d时尿直肠隔与泄殖腔膜融合。胚胎16d肛膜完全破裂，直肠与外界相通。
Conclusions In the normal rats on gestational days 15, URS fuses with cloacal membrane, and on gestational days 16 anal membrane ruptures and rectum communicate with the anus.
7. 肛膜的解释
7. 16d时肛膜破裂，直肠与尾沟相通。
On gestational days 16, anal membrane broke down and the rectum communicated with the anus.