[Structure of the cervix uteri and course of the cervical canal of the uterus in sheep].

Basing on plastoid casts (Technovit) the relief of cervical lumen was demonstrated. The occlusive structures in cervix are termed as plicae infundibulares and plicae semilunares. The findings verify that present methods of artificial insemination are not practicable according to the anatomical structures of cervix uteri.