Ключевые слова: animal, background, biology, biomedical, biotechnology, cancer, cell, cloning, colorful, cytoplasm, differentiation, division, egg, embryo, embryology, embryonic, fertilization, genetic, group, healthy, human, illustration, immune, in vitro, laboratory, life, magnification, medical, medicine, microbiology, microscope, microscopic, molecular, normal, nucleus, organism, regeneration, reproduce, reproduction, research, science, scientific, somatic, stem, structure, technology, transparent, tumor,