Ключевые слова: anatomical, anatomy, animal, background, biology, bladder, body, cell, cross, cytoplasm, education, educational, ejaculate, epididymis, erectile, eukaryotic, genetic, gland, health, healthy, histology, human, illustration, magnification, male, material, medical, medicine, membrane, micro, microscope, microscopic, muscle, organ, penis, pubic, reproduction, reproductive, science, scientific, scrotum, section, smooth, structure, system, testis, tissue, urethra, urogenital, vessels,