查询词典 cloaca maxima

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.

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。

For these turtles, the male's cloaca is located further down his tail than the females and is only barely noticeably thicker.

雄性刺山的泄殖腔孔较雌性来说，通常距肛盾更远，而且尾巴更粗。

Because the same sex determination gene fragment of fowl as SRY of mammal is not found, the discovered peculiar gene fragment in XhoI family will become the basic study of sex determination gene;The basis of sex differentiation is aromitic enzyme which controls sex hormone′s transformation; sex-linked inheritance and cloaca sexing will still bethe main methods of sexualization; a female can turn into a male through hormone in ducing and the changed female can turn into its genetic sexwhile a male can′t turn similarly.

家禽中虽未发现象哺乳动物SRY基因的性别决定片段，但XhoI家族中特异片段的发现可能成为性别决定基因研究的基础，性别分化的基础是控制性激素转型的芳香化酶；伴性遗传和泄殖腔鉴别法仍然是性别鉴定的主要方法；利用激素诱导只能使雌转雄而不能使雄转为雌，且转变后仍能恢复原来的遗传性别。

When epitheliocytes and cloaca membrane extended ventrally, dorsal membrane ruptured, leaving anorectum connected to the outside.

Van der Putte认为肛门直肠发育主要因素在于背侧泄殖腔膜向尾沟移动这一过程，而没有观察到尿直肠隔与泄殖腔膜融合。

Embryonic development: During normal cloaca development process in rats, before gestational days 15, the urorectal septum developed and clearly demarcated the boundaries of the future rectum dorsally and urogenital sinus ventrally.

结果 ①胚胎发育：泄殖腔发育过程中，胎龄15天前的正常鼠胚，尿直肠隔将泄殖腔分为腹侧的尿生殖窦和背侧的直肠两部分，二者共同相通于泄殖腔管。

All ARM rats were affected by persistent cloaca or rectourethral fistula. Some experts found during the anorectal development in human beings, URS never fused with cloacal membrane, however, we thought in ETU treated rats the failure of fusion of URS with the cloacal membrane was the immediate reason of the ARM.

虽然有学者研究发现在人类正常肛门直肠发育的过程中，尿直肠隔始终没有与泄殖腔膜融合，但我们认为尿直肠隔未与泄殖腔膜融合是ETU诱导的大鼠肛门直肠畸形发生的直接原因。

In the fourth week, URS divides cloaca into urogenital sinus anteriorly and primitive rectum posteriorly, which communicate with each other to give rise to the cloacal canal.

讨论 传统理论认为，在胚胎第4周，尿直肠隔将泄殖腔分为前后两部分，前者为尿生殖窦，后者为原始直肠。

By dynamic observation of ARM occurrence in ETU treated rats, we found ARM related to the following factors:① Cloacal membrane was too short.② Cloaca configuration was abnormal.③ The tail groove did not form.④ Fusion of URS with cloacal membrane failed.

我们动态观察了ETU诱导的大鼠肛门直肠畸形的发生过程，发现肛门直肠畸形发生与下列因素有关：①泄殖腔膜过短；②泄殖腔构型异常；③没有尾沟形成；④尿直肠隔未与泄殖腔膜融合。

Normal rat embryos and embryos with ARM from gestational days 12.5to 20were sectioned serially and sagittally and stained with HE to observe development of cloaca and anorectum continually and contrastively.

2·结果①胚胎发育：泄殖腔发育过程中，胎龄15天前的正常鼠胚，尿直肠隔将泄殖腔分为腹侧的尿生殖窦和背侧的直肠两部分，二者共同相通于泄殖腔管。

Wavelet modulus maxima with high frequency and low frequency coefficients were obtained firstly through multiscale decomposition of well logging data;then important wavelet coefficients were chosen according to the fusion principle where high frequency coefficients were taken as maximal absolute values and low frequency coefficients were selected by edge detection principle;finally alternating projection algorithm was applied to reconstruct the fusion curve.

首先对原始测井曲线进行多尺度分解，得到不同尺度下的小波低频系数和高频模极大值；然后选用高频系数取绝对值极大、低频系数采用边缘法的融合规则，选取重要的小波系数；最后利用交替投影算法重构融合曲线。

Objective To study the effect of chitosan in the prevention of fibrous scar formation in the epidural space after laminectomy.

目的 观察选择性脊神经后根切除术椎板切除后硬膜外几种防瘢痕粘连物质的作用并探讨其机制。

On his way to the lift, he looked back to us or was it me his eyes pointing?

当他要进电梯时，他回头看我们（或者说是我，他的眼光？