结果 泄殖腔发育过程中,胎龄15d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.Results In normal fetus, the urorectal septum ( URS ) descended, its distance to cloacal membrane decreased gradually....
Access was via a narrow archway.通道入口是一道狭窄的拱门。Ascomycetes also important in study of mitotic recombination via a parasexual cycle.子囊菌在研究准性生殖中也是重要的.The technology to allow relief workers to contact the outside world via sa...