Uterus Endocervix Columnar epithelium junction at exocervix Squamous cells Development of AT BIRTH ↓ the cervical Endocervix Exocervix transiformation Ectropion with exposed columnar zone epithelium IN THE YOUNG ADULT ↓ Exocervix with columnar ju original site "Transformation zone" with regrowth of squamous epithelium IN THE ADULT Figure 19-5 ◆ Schematic of the development of the cervical transformation zone.Development of the cervical transiformation zone