2Histology, embryology, cytology / [Yuliy Ivanovich Afanasyev - Dr. of med. sciences, Prof., Honored scientist of the Russian Federation, Corresponding member of RANS, Boris Vladimirovich Aleshin - Dr. of biol. sciences, Prof., Honored scientist of the Ukrainian SSR, Nikolai Petrovich Barsukov - Dr. of med. sciences, Prof. [et al.]