Читать книгу Ridley's The Vulva - Группа авторов - Страница 23

When embryo flexion has been completed (day 24), the anterior limit of the cloacal membrane abuts on the base of the umbilical cord. On either side of the cloaca are the paired primordia of the genital tubercle (Figure 1.8a) which fuse as the cloaca retracts from the umbilical cord to form an anterior wall. Posterior to the tubercle and running laterally by the sides of the cloacal membrane are the cloacal folds, and lateral to these the genital swellings (Figure 1.8b).